1 - Water can be separated from alcohol water mixture by
Distillation
2 - In addition to hydrogen, the other abundant element present on Sun€™s surface is
Helium
3 - The most abundant element by number in the living system is :
Hydrogen
4 - What is the element required for solar energy conversion ?
Silicon
5 - The mass number of a nucleus is
the sum of the number of protons and neutrons present in the nucleus
6 - The inexpensive and commonly used variety of glass is called soda glass. It is called so because
is made using soda(sodium carbonate)
7 - The gas used in the manufacture of vanaspati from vegetable oil is
hydrogen
8 - The ionic radii of N3-, O2-, F- and Na+ follows the order
N3- > O2- > F- > Na+
9 - The graphite rods in the nuclear reactor
convert fast moving neutrons into thermal neutrons
10 - The new strain of bacteria produced by biotechnology in alcohol industry is
Pseudomonas putida
11 - Molasses a by-product in the manufacture of sugar, is converted into
Alcohol
12 - Denatured spirit is ethanol mixed with
Pyridine
13 - Rectified spirit is :
95% ethyl alcohol
14 - The reaction intermediate formed during the preparation of diethyl ether from ethanol by treatment with H2SO4 is
Carbocation
15 - Which one of the following acids is used in battery ?
Sulphuric acid
16 - Which of the following is the strongest base in aqueous solution ?
Diethylamine
17 - Which of the following acids serves as an electrolyte in a lead storage battery?
Sulphuric acid
18 - Which is known as carbolic acid?
Phenol
19 - Citric acid is present in free form in
Lemon
20 - Depletion of ozone layer causes
Skin cancer
21 - Nitrification is the biological process of converting
Ammonia into nitrite
22 - Besides CO2, the other green house gas is
CH4
23 - The greenhouse effect is caused by the higher level of which gas in the atmosphere ?
Carbon dioxide
24 - The atmospheric gas that is mainly responsible for green house effect :
Carbon dioxide
25 - Wood spirit is
Methyl alcohol
26 - When formaldehyde and potassium hydroxide are heated, we get
Methyl alcohol
27 - Which of the following metals causes Itai-Itai disease ?
Cadmium
28 - Which component referred to as 'Milk sugar'?
Lactose
29 - Match the List-I with List-II and select the correct answer using the codes given belowList-I (Vitamin)List-II(Chemical compound)F.Vitamin A1.ThiaminG.Vitamin B12.RetinolH.Vitamin C3.Ascorbic acidJ.Vitamin E4.TocopherolCodes :FGHJA.4132B.2314C.4312D.2134
D
30 - The oil used in the froth floatation process is
pine oil
31 - The number of waves in n x 10th Bohr's orbit are
n
32 - The mass of one Avogadro number of helium atom is
4 x 6.02 x 1023 gram
33 - The items amenable to detection by soft x-rays are
genuine coins from counterfeit coins
34 - The material which can be deformed permanently by heat and pressure is called a
thermoset
35 - What is the mass percentage of oxygen in carbon dioxide (CO2)?
0.727
36 - Number of 6.023 × 1023 atoms present in one mole of a gas at STP is
6.023 × 1023
37 - The percentage of nitrogen present in ammonium sulphate is :
0.27
38 - The value of Avogadro Number is
6.023 × 1023
39 - Aqua regia is a 1 : 3 mixture, by volume, of
Conc. nitric acid and conc. hydrochloric acid
40 - Which of the following statements are correct about chloroform? a. Liquid fuel b. Anaesthetic in nature c. Produces phosgene d. Fire extinguisher
B, C
41 - Which of the following is an antidiabatic drug?
Insulin
42 - Tear gas used by the police to disperse the mob contains
Chlorine
43 - Which of the following is also used as a Bio fertilizer?
None of these
44 - The advantage of detergents over soaps is
Detergents give lather even with hard water
45 - Which one of the following is an example of a gel ?
Face cream
46 - A substance which readily forms colloidal solution in contact with water is called
Hydrophilic colloid
47 - Peptization is a process of
Dispersing precipitates into colloidal solution
48 - What do you understand by the term Espuma ?
Foam
49 - Cloud is a colloidal dispersion of
Water drops in a dispersion medium of air
50 - Which gas does not form the part of atmosphere ?
Chlorine
51 - Which one of the following statement is correct ?Ozone is found in the earth's atmosphere mostly between
20 and 50 km
52 - Which one of the following is not a €˜green house gas€™ ?
Nitrogen
53 - Green house effect is accelerated by
All of these
54 - Smoke is formed due to
Solid dispersed in gas
55 - The components of water can be separated by
Chemical methods
56 - Which of the following is not a chemical reaction?
Conversion of water into steam
57 - Chemical formula of washing soda is
Na2CO3.10H2O
58 - What is the chemical name for €˜Baking Soda€™ ?
Sodium bicarbonate
59 - The chemical name of €˜Common salt€™ is
Sodium chloride
60 - When a lead storage battery is discharged,
Sulphuric acid is consumed
61 - Which of the following pairs of materials serves as electrodes in rechargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ?
Nickel and cadmium
62 - In a Carbonyl group a carbon atom makes double bond with
Oxygen
63 - Williamson's synthesis is widely used in the laboratory preparation of
Ethers
64 - German silver, an alloy, does not contain the metal
Silver
65 - Colour imparted to the Bunsen flame by strontium salt is
Crimson red
66 - An oxidising agent is a
An electron acceptor
67 - Silver gets corroded due to ________ in air.
Hydrogen Sulphide
68 - Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygend. Chemical reaction with CO2
A and C
69 - Photo-oxidation process is initiated by
Light
70 - Galvanised iron is made by coating iron with
Zinc
71 - Slag is a name given for
Molten alumina
72 - Solder is an alloy of
Tin, lead
73 - Solder is an alloy of
Tin and lead
74 - Solder metal is an alloy of
Lead and tin
75 - The lightest gas which is non-inflammable is
Helium
76 - Preparation of €˜Dalda or Vanaspati€™ ghee from vegetable oil utilizes the following process :
Hydrogenation
77 - Which among the following is pure matter ?
Carbon dioxide
78 - The National Chemical Laboratory (India) is located in
Pune
79 - Who is known as the 'father of modern chemistry'?
Antoine Lavoisier
80 - Ozone depletion in the atmosphere is mainly caused by
Chlorofluorocarbon
81 - Ozone depletion in the stratosphere is mainly caused by
Chlorofluorocarbons
82 - Which of the following is not a gaseous air pollutant?
Hydrocarbon
83 - Which of the following is ozone depleting pesticide ?
Methyl bromide
84 - Threshold limit value of copper in the atmospheric air is
1.0 mg/m3
85 - In which of the following states maximum iron ore is found ?
Fe2O3
86 - Food cans are coated with tin and not with zinc because
Zinc is more reactive than tin
87 - Cinnabar is an ore/mineral of
Mercury
88 - The percentage of carbon in cast iron is :
3 to 5
89 - Brass is a solution of molten copper in
Molten zinc
90 - Which one is the simplest form of alkane?
Methane
91 - Which of the following is not a natural source of hydrocarbon?
Mica
92 - The element with highest first ionisation energy is
Helium
93 - In a period from Li to F, ionisation potential
Cannot be predicted
94 - In the periodic table of elements, on moving from left to right across a period, the atomic radius
Decreases
95 - The chief constituent of vinegar is
Acetic acid
96 - Vinegar made by fermentation from cane sugar contains
Acetic acid
97 - Which one of the following is found in Vinegar ?
Acetic acid
98 - Which of the following is not a derivative of barbituric acid?
Equanil
99 - Which of the following substance's smell is similar to Ethanoic acid?
Vinegar
100 - High concentration hydrocarbon pollutants in atmospheric air causes
Cancer
101 - Which one is not a primary greenhouse gases in the Earth's atmosphere?
Nitrogen
102 - Which of the following is secondary air pollutant ?
SO2
103 - Sullage water is €“
Waste water released from kitchen
104 - The gas liberated in the Bhopal gas tragedy was:
Methyl isocynate
105 - Which one of the following elements is an example of noble gas ?
Helium
106 - Helium gas is filled in balloons because
It is lighter than air
107 - The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is
Helium
108 - At room temperature, the metal that remains liquid is:
Mercury
109 - A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be
Copper
110 - Which of the following is a natural polymer?
Starch
111 - Plastic is a type of
Polymer
112 - Polythene is polymer of
Ethylene
113 - Glycol is used to manufacture which of the following ?
Terylene
114 - Silk fibre chemically is :
Protein
115 - The chemical used for cloud seeding for artificial rains is
Silver Iodide
116 - Which of the following is used as anesthetic ?
NO
117 - Aspirin is chemically known as
Acetylsalicylic acid
118 - Gypsum is used for improvement of:
Saline soils
119 - Which of the following laser types is used in a laser printer?
Semiconductor laser
120 - 0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by
4
121 - Which of the following methods is used in determining the number average molar mass of a macromolecule?
Osmotic pressure
122 - Molality of pure water is
55.5
123 - A solution is
A homogeneous mixture of two or more substances
124 - Which one is the most dense liquid from the below?
Choloform
125 - Indane gas is mixture of
Butane and propane
126 - The charcoal used to decolourise brown sugar solution is
Animal charcoal
127 - The major component in the LPG is
Butane
128 - Domestic cooking gas consists mostly of
Liquified butane and isobutane
129 - Which one of the following is known as the 'brown coal'?
Lignite
130 - Which among the following is not a characteristic of transition metals?
Tendency to gain electrons
131 - The most electronegative element among the following is
Fluorine
132 - Total number of halogen elements found in the periodic table is
5
133 - Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has
Stable half filled 2p sub level
134 - The elements with atomic numbers 9, 17, 35, 53, 85 are all
Halogens
135 - Baryllium Sulphate is less soluble in water due to
High inflammable energy
136 - Chile saltpeter is the common name of:
Sodium nitrate
137 - Setting of plaster of paris involves
Hydration to form other hydrates
138 - Find the odd one:
Slaked lime
139 - The chemical name of 'Plaster of Paris' commonly used for setting broken bones is
Calcium sulphate
140 - Entropy of Universe is always
Increasing
141 - In a reaction of the type A+B -> C+D one could ensure it to be a first order reaction by :
Increasing the concentration of a reactant
142 - Kinetics is the study of:
All of these are correct
143 - Bhopal gas tragedy is associated with leakage of
Methyl isocyanate
144 - The function of sedimentation tank in sewage treatment is to:
Remove suspended solids
145 - During fermentation of sugar, the compound which is always formed is :
Ethyl Alcohol
146 - If a buffer solution is diluted its pH
Remains same
147 - 'Vinegar' is a commercial name of
Acetic acid
148 - The apparatus used to test acidity of aqueous solution is
PH meter
149 - Which one of the following organic compound is used to remove stains of iron compounds?
Oxalic acid
150 - Atoms having the same number of protons but different number of neutrons are called :
Isotopes
151 - Chemical properties of isotopes
Must be same
152 - Which of the following does the nucleus of an atom consists of?
Protons and neutrons
153 - The nucleus of an atom consists of
Protons and Neutrons
154 - The mass number of a nucleus is
Sometimes more and somtimes equal to its atomic number
155 - The chemical that is used to ripen mangoes is
Calcium carbide
156 - Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as
Synergism
157 - Which of the following is used to remove ink and rust stains on cloth?
Oxalic acid
158 - KMnO4 can be used as a/an
Disinfectant
159 - The chemical name of 'laughing gas' is
Nitrous oxide
160 - Bleaching action of moist sulphur dioxide is because of its
Oxidising property
161 - Sulphur dioxide bleaches colouring matter by :
Reduction
162 - Which one of the following is commonly used for pulp bleaching in the paper industry?
Hydrogen peroxide
163 - In upper layer of atmosphere ozone is formed by
The action of ultraviolet rays on oxygen
164 - Which one of the following is used to restore the colour of old oil paintings ?
Hydrogen peroxide
165 - The metal used to galvanise iron to protect it from rusting is
Zinc
166 - Iron is prevented from rusting by coating with zinc. This process is called as
Galvanisation
167 - An electric iron has a heating element made of :
Nichrome
168 - The metal chiefly used for galvanising iron is :
Zinc
169 - The anode in a dry cell consists of
Zinc
170 - Stains of rust on clothes can be removed by :
Oxalic acid
171 - One of the constituents of tear gas is
Chloropicrin
172 - The element used for making solar cells is
Silicon
173 - DDT and BHC may act as
Carcinogens
174 - Gunpowder consists of a mixture of
Nitre, sulphur and charcoal
175 - Which of the following is not a noble gas ?
Hydrogen
176 - Milk is a
Mixture
177 - Mixture can be
Both A and B
178 - Which one out of the following helps in burning ?
Oxygen
179 - Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure?
Bromine
180 - Synthetic detergents are made from
Sodium salt of benzene sulphonic acid
181 - Commonly used antiseptic 'Dettol' is a mixture of
Chloroxylenol + terepineol
182 - The gas used in the artificial ripening of fruits is
Acetylene
183 - The common refrigerant in domestic refrigerator is
Freon
184 - The chemical used in embalming biological materials is
Formaldehyde in water
185 - The drug €˜Marijuana€™ is a
Sedative
186 - The Refrigerant 'FREON' is
Difluoro Dichloro Methane
187 - The chemical(s) most commonly used for cloud seeding or €˜artificial rainmaking€™ is/are
Silver Iodide
188 - 'Fire-fighting clothes' are made from
Asbestos
189 - Trinitrotoluene is
Used as an explosive
190 - Ferrous sulphate is used in water treatment as a/an
Coagulant aid
191 - Charcoal is used in water treatment as a/an
Adsorbent
192 - Which of the following is a secondary pollutant ?
CO
193 - Ultraviolet radiation striking the earth is due to the depletion of
Ozone
194 - Many people died in London in 1952 as result of air pollution producing
Smog
195 - Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives
Copper at cathode and oxygen at anode
196 - Aluminium can be purified by
Electrolysis
197 - The aqueous solution of potassium chloride is
A strong electrolyte
198 - Sodium is produced by the electrolysis of
Molten sodium chloride
199 - Bleaching powder is prepared by passing :
Chlorine over slaked lime
200 - Which of the following gases is present under pressure in soft drinks?
Carbon dioxide
201 - If we burn graphite,
No residue will be left
202 - Lead pencil contains
Graphite
203 - Highest percentage of carbon is found in which form of coal?
Anthracite
204 - The main source of carbon monoxide is
Transportation
205 - Which among the following is used to dilute oxygen in the gas cylinders used by divers ?
Helium
206 - Which one element from below list is liquid at room temperature?
Bromine
207 - Which among the following elements is found in maximum percentage in the human body ?
Oxygen
208 - Iodine can be separated from a mixture of Iodine and Potassium Chloride by
Sublimation
209 - The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is:
Helium
210 - The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
p-electrons in CI(Z = 17)
211 - The metallurgical process in which a metal is obtained in a fused state is called
smelting
212 - The molecules of which gas have highest speed?
H2 at -73oC
213 - The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth's early life and solidified into hard rock's called
igneous rocks
214 - The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
Henry's law
215 - Terylene is a condensation polymer of ethylene glycol and which acid?
Terephthalic acid
216 - The material known in commerce as Terylene is a
Synthetic fibre
217 - Nylon is a type of
Polyamide
218 - Nylon is made up of :
Polyamide
219 - Nylon threads are made of
Polyamide polymer
220 - For generation of biogas, the materials commonly used are
Animal wastes
221 - The main constituent of natural gas is
Methane
222 - Which of the following is biodegradable ?
Paper
223 - Which of the following is a commercial source of energy?
Natural gas
224 - Which of the following is not a commercial source of energy?
Firewood
225 - The alkaloid naturally found in coffee, cocoa and cola nut is
Caffeine
226 - Formic acid is produced by
Red ants
227 - Which one of the following is most acidic?
Al2O3
228 - Milk tastes sour when kept in the open for sometime due to the formation of
Lactic acid
229 - ________ is used for making vinegar.
Acetic acid
230 - When there are two electrons in the same orbital, they have:
Opposite spin
231 - The antiparticle of an electron is
Positron
232 - Nucleons are regarded as composites sub-particles known as
Quarks
233 - Conduction band electrons have more mobility than holes because they
Experience collision less frequently
234 - Which one of the following has greatest mass ?
Neutron
235 - The polymer obtained by the condensation of hexamethylene diamine and adipic acid is :
Nylon 66
236 - Neoprene is prepared by polymerisation of which of the following
2-chloro-1, 3-butadiene
237 - Neoprene is a polymer of
Chloroprene
238 - Silicone is a polymer of
Dialkyl dichloro silane
239 - The monomers of dacron are
Ethylene glycol and terephthalic acid
240 - The metal that is usually extracted from sea water is
Mg
241 - The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
levigation
242 - The inert gases are ____ in water.
sparingly soluble
243 - The molecular formula of phosphorous is
P4
244 - The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
periodic table of contents
245 - Atoms of same element having different mass numbers are called________
Isotopes
246 - How many neutrons does iron have?
30
247 - The electronic configuration of an atom having atomic number €˜20€™ is
2, 8, 8, 2
248 - Nucleus of an atom consists of.
Proton and Neutron
249 - Which of the following is not a nucleon?
Positron
250 - The purest form of Iron is :
Wrought iron
251 - Which one of the following contains maximum percentage of carbon ?
Cast iron
252 - Stainless steel is an alloy of
Chromium, carbon and iron
253 - Iron is extracted from
Haematite
254 - Which is the purest form of iron?
Wrought iron
255 - Which among the following metals provides amphoteric oxide ?
Aluminium
256 - Impure camphor is purified by
Sublimation
257 - Iron filings can be separated from a heterogeneous mixture using the technique of :
Magnetization
258 - Electric bulbs are filled with :
Argon
259 - The most abundant inert gas in the atmosphere is
Argon
260 - The strongest acid of the following is
P-nitrophenol
261 - Methanoic and ethanoic acids can be distinguished by the action of
Tollen's reagent
262 - Which of the following alkali metals has highest specific heat?
Lithium
263 - Among the fuels given below, the one with highest calorific value is
Natural gas
264 - Which of the following is the best fuel in terms of energy released per gram of fuel?
Hydrogen
265 - The most volatile of the given liquids is
Liquid He
266 - The three elements most needed in common fertilisers are :
Nitrogen, Potassium and Phosphorous
267 - Liquid Nitrogen boils at
77 kelvin
268 - Which one of the following is not a fertilizer?
Calcium sulphate
269 - Which of the following gases is mixed with oxygen for breathing by divers in aqua lungs?
Nitrogen
270 - Bauxite is used as raw material by which industry ?
Aluminium
271 - Brass contains
Copper and Zinc
272 - Brass is a
Homogeneous mixture
273 - Brass is an alloy of
Zinc and copper
274 - Brass is an alloy of :
Cu and Zn
275 - The gas used for artificial ripening of green fruit is
ethylene
276 - Zone refining is used for the purification of
Ge
277 - The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
cineole
278 - The molecule which has the highest percentage of ionic character among the following is
HF
279 - The high reactivity of fluorine is due to
its high electro negativity
280 - Diamonds are glittering and attractive because light incident on them undergoes
Multiple internal reflections
281 - If lime water is kept in the air, it turns milky due to presence of :
Carbon dioxide
282 - Diamond is harder than graphite because of :
Difference in layers of atoms
283 - The gas used to extinguish fire is
Carbon dioxide
284 - Which among the following coal contains 90 per cent of carbon?
Anthracite
285 - Which of the following is not a nitrogenous fetiliser?
Superphosphate
286 - Which one of the following is used as a sowing agent in the preparation of soft drinks?
Phosphoric acid
287 - Pyrethrin used in mosquito coil is obtained from
A seed plant
288 - What is a common name for the substance which irritates lachrymal glands ?
Tear Gas
289 - The material used in solar cells contains
Silicon
290 - The nuclear particle having no mass and no charge, but only spin is
Neutrino
291 - The orientation of an atomic orbital is governed by
Magnetic quantum number
292 - 'Atomic theory' of matter was given by
Dalton
293 - The most suitable unit for expressing nuclear radius is :
Angstrom
294 - The total energy of revolving electron in an atom
Can never be positive
295 - Hamburger effect is otherwise known as€“
Chloride shift
296 - The inert gas used as beacon light is
Ne
297 - The noble gas used in radiotherapy is
Radon
298 - Inert gases are
Chemically unreactive
299 - Which one of the following does not form oxyacid ?
Fluorine
300 - What is the chemical symbol of mercury?
Hg
301 - Which of the following is a monoatomic gas?
Neon
302 - The purest form of water in nature is
Rain water
303 - In drinking water supply, which of the following treatments is not involved
Softening
304 - The two metal ions that cause hardness to water are:
Calcium, Magnesium
305 - The iron ore magnetite consists of
Fe2O3
306 - The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is
5x/36
307 - The major constituent of air is
nitrogen
308 - The main chemical constituent of clay is
aluminium silicate
309 - The mineral containing both magnesium and calcium is
dolomite
310 - Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
0
311 - The Fungus which is used in the alcohol industry is
Yeast
312 - Which of the following is used to denature ethanol ?
Methyl alcohol
313 - Ethanol containing 5% water is known as
Rectified spirit
314 - Alcohol prepared by the distillation of wood is :
Methyl alcohol
315 - London smog is found in
Winter during morning time
316 - Photo chemical smog is a resultant of the reaction among
NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight
317 - The gas involved in Bhopal incident was
Methyl isocyanate
318 - Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere?
Chlorofluorocarbons
319 - Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ?
All the above
320 - Sour taste of €˜Coca Cola€™ is due to the presence of
Phosphoric acid
321 - An acid having basicity one is
Disodium hydrogen phosphate
322 - The acid present in red ants is
Formic acid
323 - Bee sting contains
An acidic liquid
324 - Sweat contains water and ________
Salt
325 - The main use of salt in the diet is to
produce in small amounts the hydrochloric acid required for the digestion of food
326 - The monomer of polythene is
ethylene
327 - The luster of a metal is due to
presence of free electrons
328 - The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
6.023 x 1019
329 - The most malleable metal is
gold
330 - The most pure form of Carbon among the options is
Anthracite
331 - Carbon footprint can be reduced by
All of these
332 - Which of the following gases is most toxic ?
Carbon monoxide
333 - Why is water not suitable for putting out a petrol fire ?
Water, being heavy, slips below petrol which thus remains in contact with air and burns
334 - Which of the following is used as a lubricant in heavy machines?
Graphite
335 - Which of the following is used in making smoke bombs?
Carbon
336 - Water gas is the mixture of
Carbon monoxide and hydrogen
337 - In electro-refining, the pure metal is deposited on
Cathode
338 - Which of the following electrodes is used in strongly alkaline solution?
Mercury - mercuric oxide electrode
339 - The laws of electrolysis are given by
Faraday
340 - Global warming may result in
All of the above
341 - Oxygen which is vital for life is a product of photosynthesis and comes from
Water
342 - Which one of the following is a greenhouse gas ?
Carbon dioxide
343 - Acid rain is caused by the pollution of environment by
Nitrous oxide and Sulphur dioxide
344 - The €˜Green House effect€™ is produced due to the presence of excess amount of
Methane
345 - Which one is the most reactive gaseous element?
Flourine
346 - Which of the following metals occurs in free state ?
Lead
347 - The €œKing of Metals€ is :
Gold
348 - Which of the following metals is used in Space Crafts to withstand high temperatures ?
Ti
349 - Phosphorus is kept in water because
Its ignition temperature is very low
350 - Most commonly used bleaching agent is
Chlorine
351 - The acid which is secreted by the glands in the stomach wall is
Nitric acid
352 - Hydrochloric acid is also known as
Muriatic acid
353 - Heating of a ore below its melting point in the absence of air is known as
Calcination
354 - Stainless steel is usually made by alloying the steel with
Chromium and nickel
355 - Which one of the following mineral does not contain oxygen ?
Cryolite
356 - Which mineral is the ore of aluminium ?
Bauxite
357 - Which of the following is a metallic ore ?
Galena
358 - Magnalium is an alloy of
Aluminium and Magnesium
359 - Magnetite is
Fe3O4
360 - Atomic number of an atom gives the number of which of the following ?
Protons
361 - The chemical bahaviour of an atom depends upon
The number of electrons orbiting around the nucleus
362 - Which one of the following has a maximum tendency to form M3 ion ?
N
363 - A matured mammalian cell without nucleus is
Erythrocyte
364 - Which of the following metals can displace copper from copper sulphate solution ?
Iron
365 - Which type of radiations are absorbed by the upper layer of the atmosphere?
Ultraviolet
366 - Sulphur dioxide level in the atmosphere can be reduced by using
Low - sulphur fuels
367 - The term 'brown air' is used for
Photochemical smog
368 - The sewage obtained from water closets and urinals is known as
Sanitary waste
369 - Which one amongst the following is not a Green House gas?
Nitrogen
370 - Main pollutant present in automobile exhaust is
CO
371 - The liquid waste from kitchens and baths, of residences is known as :
Sullage
372 - Most poisonous pollutant in water is
Arsenic
373 - Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below.(A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium
A, C and E
374 - Smog is
A combination of smoke and fog
375 - Asbestos is formed of :
Calcium and Magnesium
376 - Bayer's reagent is
Alkaline potassium permanganate
377 - Bone ash contains
Calcium phosphate
378 - Cement is made hard with
Hydration and dissociation of water
379 - 'Plaster of Paris' is made by partial dehydration of
Gypsum salt
380 - Chemical name of common salt is
Sodium Chloride
381 - Nitrogen forms a variety of compounds in all oxidation states ranging from
€“3 to +5
382 - What is the covalency of nitrogen in ammonia molecule
3
383 - What is 'milk of magnesia' chemically?
Magnesium hydroxide
384 - Which one of the following is a micro-element ?
Chlorine
385 - When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is
Carbon dioxide
386 - Which of the following is used as filler in tyre of rubber ?
Carbon black
387 - The open ""Sigrees"" or coal stoves often require fanning to sustain burning because of
Tendency of carbon dioxide to form a layer along with dust smoke
388 - 24 carat of diamond is equal to
200 mg
389 - 1 carat of diamond is equal to
200 mg
390 - The metal ion present in Vitamin B12 is
Cobalt
391 - The metal present in vitamin B12 is
Co
392 - Which of the following is not present in RNA
Thymine
393 - The enzyme that converts glucose to ethyl alcohol is :
Zymase
394 - The fat of a common mussel-secretes a sticky glue that can be used to make heart implants. The unique chemical compound present in the glue is:
Dihydroxy phenyl alanine
395 - Freon used as refrigerant is chemically
Chlorofluoro hydrocarbon
396 - The gas used for artificial fruit ripening of green fruit is
Ethylene
397 - Which one of the following vegetable oils is used in the manufacture of paints?
Linseed oil
398 - KMnO4 can be used as
Disinfectant
399 - A detergent is a
Cleansing agent
400 - Oxygen has (+) oxidation number only in
OF2
401 - The oxidation number of nickel in K4[Ni(CN)4] is
Zero
402 - How many neutrons are there in 92U238 atom ?
146
403 - The number of neutrons present in an element having mass number 226 and atomic number 88 is :
138
404 - Who modified Bohr's theory by introducing elliptical orbits for electron path?
Sommerfeld
405 - Which of the following is the petroleum wax ?
Paraffin wax
406 - The hottest part of the gas flame is known as
Luminous zone
407 - Water is not effective in extinguishing a fire caused by petrol because
Water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
408 - The temperature of oxy-acetylene flame is around
4000°C
409 - Helium gas is used in gas balloons instead of hydrogen gas because it is
Non-combustible
410 - Which acid is used in Lead storage battery?
Sulphuric acid
411 - The acid used in lead storage cells is
Sulphuric acid
412 - The acid used in lead storage cells is
Sulphuric acid
413 - Milk tastes sour when it is left in open for some time. This happens due to the formation of
Lactic acid
414 - The compound used in prickly heat powder to prevent excessive sweating is
Boric acid
415 - The constituents of automobile exhaust that can cause cancer is/are :
Lead
416 - The acid rain destroys vegetations because it contains
Sulphuric acid
417 - Of the following, which one pollutes the air of a big city ?
Lead
418 - Of the following which one pollutes the air of a big city ?
Lead
419 - Which of the following is usually not an air-pollutant?
Nitrous oxide
420 - The function of skimming tank in sewage treatment is to remove
Oil and fatty substances
421 - Acid rain is caused due to emission of which of the following into the atmosphere ?
Oxides of nitrogen and sulphur
422 - The depletion of Ozone layer is mainly due to
Chlorofluorocarbons
423 - Chemical name of vinegar is
Acetic acid
424 - Which one of the following organic compounds has fruity smell?
Ester
425 - The Latin word formica means ant. The name formic acid is derived from this Latin word because
this acid was first obtained by the distillation of ants
426 - The ore which is found in abundance in India is
monazite
427 - The inherited traits of an organism are controlled by
DNA molecules
428 - The heat energy produced when the human body metabolises 1 gram of fat is
39 KJ
429 - What are the number of moles of CO2 which contains 16 g of oxygen?
0.5 mole
430 - Which type of fire extinguisher is used for petroleum fire ?
Foam type
431 - Man dies in the atmosphere of CO, because it
Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
432 - It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of
CO
433 - Which gas is used as fire extinguisher ?
Carbon dioxide
434 - The process which does not evolve CO2 in air is
Photosynthesis
435 - Galvanization is the :
Deposition of zinc on iron
436 - Which one of the following metals is used to galvanise iron ?
Zinc
437 - A non-electronic conductor is
None of these
438 - The anode of a dry cell is made up of
Zinc
439 - The coating of a thin layer of zinc on steel or iron objects is known as
Galvanising
440 - Element 106 was discovered by
Seaborg
441 - The gas used for filling weather balloons is
Helium
442 - The most abundant element is
Oxygen
443 - A balloon filled with helium rises in air because
Helium is less dense than air
444 - Which one of the following is also known as solution ?
A homogeneous mixture
445 - A powerful eye irritant present in smog is
Peroxyacetyl nitrate
446 - Which of the following is not a natural source of air pollution ?
None of the above
447 - CNG used in automobiles to check pollution, mainly consists of
CH4
448 - What are the major pollutants of cigarette smoke?
Carbon monoxide and nicotine
449 - Which of the following metals is not a pollutant ?
Aluminium
450 - The first metal used by a man was
Copper
451 - White phosphorus is generally kept under
Water
452 - Which metal is extracted from sea water?
Magnesium
453 - The rusting of iron is a/an
Electrochemical change
454 - When iron rusts, its weight
Increases
455 - Highly toxic gas which causes headache, visual difficulty, paralysis and even death is
CO
456 - Water gas is the combination of
CO and H2
457 - The gas that causes suffocation and death when coal or coke is burnt in a closed room is
Carbon monoxide
458 - Which one is not a pure form of carbon?
Gold
459 - Which one is the purest form of carbon?
Diamond
460 - For a spontaneous chemical process, the free energy change is
Negative
461 - When a bond is formed between two atoms, the energy of the system will
Remain the same
462 - The minimum energy required for an effective collision is
Activation energy
463 - Which of the following produces highest amount of energy upon oxidation?
Fat
464 - Which of the following has least negative electron gain enthalpy?
P
465 - The increasing abundance of green house gases in atmosphere has led to the following effect except
Oxygen fertilization effect
466 - The source of energy that causes the least global warming is
Geothermal energy
467 - Which of the following fuels causes minimum environmental pollution?
Hydrogen
468 - Biofertilizers convert nitrogen to ________ .
Ammonia
469 - The elements in the modern Periodic table are arranged according to their
Atomic number
470 - The chemical name of quartz is
Sodium silicate
471 - What is the most common salt in sea water ?
Sodium chloride
472 - Fertiliser having high nitrogen content is :
Ammonium nitrate
473 - Which one of the following is found in kidney stones?
Calcium oxalate
474 - Which one of the following is not present in cement ?
Alum
475 - Which could be used as fuel in propellant or rockets?
Liquid Hydrogen and Liquid Oxygen
476 - When ethene is passed through a dilute solution of KMnO4 the pink colour changes to?
Colourless
477 - Acid ferric chloride FeCl3 solution reduces to ferrous chloride FeCl2 solution by?
Nascent Hydrogen
478 - Tyndall effect is due to?
Scattering of beam of light
479 - Atom having positive charge is called?
Cation
480 - Pure iron is obtained by the reduction of which of the followings in the blast furnace?
Iron Oxide
481 - Which of the following metal causes Itai-Itai diseases?
Cadmium
482 - Why pure water is non conductor of electricity?
Water is almost unionized
483 - The energy of the rotational level with J=10, in wave number cm-1 unit is?
110 B
484 - White phosphorus is always kept under?
Water
485 - Atomic number of Aluminium is?
13
486 - ___ is an electron deficient molecule?
BF3
487 - In benzene all carbon atoms are __ hybridization.
Sp2
488 - LPG is a hydrocarbon consisting of a mixture of?
Propane and Butane
489 - Water is not effective in extinguishing a fire caused by petrol because?
Water and petrol are immiscible with each other and petrol which forms the upper layer continues to bum
490 - Law of Octaves was introduced by?
John Newland
491 - Example of corrosion is?
All of the above
492 - Which of the following salt is fairly soluble in water?
LiF
493 - An inorganic reagent which reacts in pyridine solvent forms an alkyl halide when treated with?
Alcohol
494 - What is Anode?
Cathode is positively charged electrode
495 - Cathode of a lead storage battery is made up of?
Lead oxide
496 - Number of replaceable OH€“ ions present in a molecule of base is called?
Acidity
497 - Aqua regia is a 1:3 mixture by volume of?
Concentrated Nitric acid and concentrated Hydrochloric acid
498 - A given compound always contains exactly the same proportion of elements by mass is the statement of?
Law of definite proportions.
499 - When electricity passed through neon it glows?
Red
500 - A reaction between an acid and base produces?
Salt and water
501 - Ions with fewer electrons and positive charge are called?
Cations
502 - When 4 gm of NaOH is dissolved in 10 litres of solutions the pH is?
12
503 - Which type of glass is used for making glass reinforced plastic?
Fiber Glass
504 - Cement is made hard with?
Hydration and Dissociation of water
505 - The repetition of properties after regular intervals is called?
Periodicity
506 - Which gas does not form the part of atmosphere?
Chlorine
507 - Amount of energy required to separate nucleons is called?
Binding energy
508 - Glycol is added to aviation gasoline because it?
Prevents freezing of petrol
509 - When reactants are added then rate of reaction?
Increase
510 - Glacial acetic acid is miscible with?
All of the above
511 - In the lime kiln the reaction CaCO3€”>CaO+CO2 goes to completion because of?
CO2 escapes out continuosly
512 - Carbon atom of a carbonyl group is?
SP2-Hybridized
513 - A proton is identical with?
Ionized hydrogen molecule
514 - Silver halides are used in photographic plates because they are?
Reduced by light
515 - Tetraethyl lead TEL is?
An antiknock compound
516 - Al-Razi divided chemical substances on the basis of their?
Origin
517 - Substance which donate the pair of electrons for bond formation are known as?
Bases
518 - Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?
Hydrogen
519 - Which one of the following elements is a metalloid?
As
520 - Milk of magnesia is an example of?
Suspension
521 - who discovered phenomenon of diffusion of gases?
Graham
522 - When ethyl alcohol is produced by fermentation process the gas which escapes in the form of bubbles is?
Carbon Dioxide
523 - Mortar is a mixture of water, sand and?
Slaked lime
524 - Most abundant inert gas in the atmosphere is?
Argon
525 - Metals are good conductors because?
They contain free electrons
526 - 'Greenhouse effect' is produced due to the presence of excess amount of?
Methane
527 - An atomic pile is used for?
Conducting nuclear fission
528 - Pasteurisation is the process in which milk is heated to?
630 C for 30 minutes
529 - Ethanol containing 5% water is known as?
Rectified spirit
530 - Metal constituent of chlorophyll is?
Magnesium
531 - Bond which is formed by one sided sharing of pair of electrons is called?
Co-Ordinate Covalent bond
532 - Toluene is a compound in which benzene has a substituent?
533 - Which isotope of hydrogen is radioactive?
Tritium
534 - ___ is not an amorphous solid?
Glucose
535 - Process in which a solid directly changes to vapours is known as?
Sublimation
536 - Neil Bohr presented the atomic model in?
1913
537 - Which among the following coal contains 90% of carbon?
Anthracite
538 - Most suitable vessel for storing concentrated sulphuric acid is?
Glass vessel
539 - Electric bulbs are filled with?
Argon
540 - The molar mass of H2SO4 is?
98 amu
541 - Isotopes differ in?
Properties which depends upon mass
542 - Which of the following vegetable oils does not contain essential fatty acids?
Sunflower oil
543 - In silvery paints the main constituent present is?
Aluminium Powder
544 - In sp2 type hybridization the three equivalent sp2 orbitals lie in the same plane and at angle of?
120 Degree
545 - The chemical formula of rust is?
Fe2O3
546 - Who discovered Neutron?
Chadwick
547 - How much percentage of earth crust consist of silicon?
0.28
548 - Salts that is formed by the reaction of strong acidic with weak base are?
Acidic
549 - Force which holds atoms together in a molecule or crystal is called?
Chemical bond
550 - Longest period of periodic table?
6th
551 - Acids which contain one acidic hydrogen are called?
Mono-protic
552 - Advantage of detergents over soaps is?
Detergents give lather even with hard water
553 - With the rise in temperature the solubility of a gas?
Decrease
554 - Wave numbers of spectral lines __ from P-fund series to Lyman.
Decreases
555 - Which substance is known as oil of vitriol?
Sulphuric Acid
556 - Carborundum is a compound of?
SiC
557 - Mass number of an element is represented by?
A
558 - Identify correct statement among the following?
Catalyst influence on the rate of forward and backward reaction equally.
559 - Shape of s-sub shell is?
Spherical
560 - Laughing gas is?
Nitrous oxide
561 - Which among the following is not a radioactive element?
Cadmium
562 - Which compound is slightly soluble in water?
AgCl
563 - Fehling's test and Tollen's test are used for the identification of?
Aldehydes
564 - Melting point of mercury is?
-39 Degree Centigrade
565 - Total number of sigma bonds found in the CH3-CH=C=CH-C ‰¡C-H compound are?
11
566 - General formula for alkenes is?
CnH2n
567 - Metal extracted from seawater is?
Magnesium
568 - Which cell consists of three sub shells?
M
569 - Hamburger effect is otherwise known as?
Chloride shift
570 - Number of protons are equal to the number of __ in a neutral atom.
Electrons
571 - Which among the following has highest melting point?
NaCl
572 - Which variety of coal contains recognizable traces of the original plant material?
Peat
573 - When concentrated H2SO4 is added to dry KNO3 brown fumes are involved. These fumes are due to?
NO2
574 - Quantum number which represent shape of orbital of electron is called?
Azimuthal Quantum Number
575 - Which isotope of hydrogen is radioactive?
Tritium
576 - Atom which accepts a lone pair of electron is called?
Acceptor
577 - Which indicator is not used in conical flask?
External indicator
578 - Which one of the following does not give Lassaignes test for nitrogen?
Hydroxylamine
579 - PVC is obtained by the polymerisation of?
Vinyl Chloride
580 - Acetic acid is prepared by?
Fermentation
581 - Galena is a mineral of?
Lead
582 - Magnalium is an alloy of?
Aluminium and Magnesium
583 - Temperature of the system decreases in?
Adiabatic expansion
584 - Atomic number of sodium is?
11
585 - What is the mathematical formula for s-sub shell?
m = 0, l = 0
586 - Among the follwing non metals which is extremely hard?
Diamond
587 - Ca(OH)2 is commonly known as?
Slaked Lime
588 - The number of elements in Sixth period is?
32
589 - Which of the following represents the correct electronic configuration of the outer most energy level of an element of VIIA in the ground state?
S2P5
590 - Atomic number of Neon is?
10
591 - Which among the following shows Brownian movement?
Colloids
592 - Which is used for silvering of mirror?
Silver Nitrate
593 - Among following which is organic mineral?
Amber
594 - e/m values in cathode rays?
Do not depend upon nature of gas
595 - Which is the hardest known natural mineral?
Tungsten
596 - Which of the following substance is a weak electrolyte?
CH3COOH
597 - Aerosol is?
Suspended solid particles in air
598 - Number of moles of solute present in 1kg solvent is called?
Molality
599 - Which of the following alkali metals has highest specific heat?
Lithium
600 - An ionic compound that is formed when an acid neutralizes a base is called?
Salts
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