1 - 1 carat of diamond is equal to
200 mg
2 - 24 carat of diamond is equal to
200 mg
3 - A ball rolling along the ground gradually slows down and finally comes to rest is due to ________
Friction
4 - A balloon filled with helium rises in air because
Helium is less dense than air
5 - A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.
The mercury level starts rising
6 - A body falling through a liquid acquires a steady velocity is known as
Terminal velocity
7 - A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be
A parabola
8 - A colour-blind person cannot
Distinguish between certain colours
9 - A detergent is a
Cleansing agent
10 - A drop of liquid assumes spherical shape because:
A sphere has the least surface area for a given volume
11 - A fixture is defined as a device which
Holds and locates a workpiece and guides and controls one or more cutting tools
12 - A fountain pen works on the principle of
Capillary action
13 - A freely suspended magnet remains horizontal at
The magnet equator
14 - A galvanometer can be converted into a voltmeter by connecting with it a
High resistance on series
15 - A light year is a measure of :
Distance
16 - A machine powered by rotating blades is a
Turbines
17 - A man jumping out of a moving train is thrown
Forward
18 - A matured mammalian cell without nucleus is
Erythrocyte
19 - A microscope used in pathological laboratories forms
Magnified, virtual and inverted image
20 - A needle or a pin floats on the surface of water because of
Surface tension
21 - A non-electronic conductor is
None of these
22 - A permanent magnet can affect
Both A & B
23 - A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?
The speeds of both the photons in vacuum are different
24 - A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously ?
They must be dropped in vacuum
25 - A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the pos
0.12638888889
26 - A powerful eye irritant present in smog is
Peroxyacetyl nitrate
27 - A rubber ball is dropped from a height of 2 metres. To what height will it rise if there is no loss of energy/velocity after rebounding ?
2 metres
28 - A single fixed pulley is used to draw water from a well because
Force is applied in a convenient direction
29 - A Step-Up transformer increases
Voltage
30 - A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?
The liquid surface falls down on the direction of motion and rises up on the back side of the tank
31 - A television channel is characterised by
Frequency of transmitted signal
32 - A transformer
Is used to decrease or increase AC voltage
33 - A voltaic cell converts chemical energy to
Electrical energy
34 - A wheel-barrow is an example of
Class II lever
35 - Acceptable noise level for human ear
< 85 db
36 - Acid rain is caused by the pollution of environment by
Nitrous oxide and Sulphur dioxide
37 - Acid rain is caused due to emission of which of the following into the atmosphere ?
Oxides of nitrogen and sulphur
38 - Air pressure is measured in which of the following units?
Pascal
39 - Alcohol prepared by the distillation of wood is :
Methyl alcohol
40 - Alpha particle is the nucleus of an atom of
Helium
41 - Among the fuels given below, the one with highest calorific value is
Natural gas
42 - An acid having basicity one is
Disodium hydrogen phosphate
43 - An aircraft can perform aerobatic manoeuvres in a vertical loop because of
Gravity
44 - An Electric generator is based on which of the following scientific principles?
Faraday's law of Electromagnetic Induction
45 - An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's
First law
46 - An oil drop spreads over water because
water has a higher surface tension
47 - Anemometer is an instrument meant for measuring ________
Wind speed
48 - Angle of friction and angle of repose are
Equal to each other
49 - Asbestos is formed of :
Calcium and Magnesium
50 - At low temperature, Lead behaves as a :
Superconductor
51 - At the center of the sun, fusion converts hydrogen into
Helium
52 - Atomic number of an atom gives the number of which of the following ?
Protons
53 - 'Atomic theory' of matter was given by
Dalton
54 - Ball pen functions on the principle of :
Surface tension
55 - Bauxite is used as raw material by which industry ?
Aluminium
56 - Bayer's reagent is
Alkaline potassium permanganate
57 - Bee sting contains
An acidic liquid
58 - Bending of light rays in denser medium is termed as:
Refraction
59 - Biofertilizers convert nitrogen to ________ .
Ammonia
60 - Blotting paper absorbs ink due to
Capillary action phenomenon
61 - Bone ash contains
Calcium phosphate
62 - Brass contains
Copper and Zinc
63 - Brass is a
Homogeneous mixture
64 - Brass is an alloy of
Zinc and copper
65 - Brass is an alloy of :
Cu and Zn
66 - Brightness of bulb depends on voltage or current?
Both A & B
67 - Carbon footprint can be reduced by
All of these
68 - Cement is made hard with
Hydration and dissociation of water
69 - Chemical name of common salt is
Sodium Chloride
70 - Chemical name of vinegar is
Acetic acid
71 - Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?
Ionosphere
72 - Choose the most appropriate answer: Natural radioactivity was discovered by
Henry Bacquerel
73 - CNG used in automobiles to check pollution, mainly consists of
CH4
74 - Conservation of energy refers to the fact that
Energy cannot be created or destroyed but can be converted from one form to another
75 - Conversion of sound energy into electrical energy is done by
Microphone
76 - Coolis tube is used to produce
X-rays
77 - Curie point is the temperature at which
A metal loses magnetic properties.
78 - Decibel is a term connected with :
Sound
79 - Decibel is the unit used for
Intensity of sound
80 - Diamond is harder than graphite because of :
Difference in layers of atoms
81 - Diamonds are glittering and attractive because light incident on them undergoes
Multiple internal reflections
82 - Dioptre is the unit of
Power of a lens
83 - During ________ motion of an object along a straight line, the velocity remains constant with time.
Uniform
84 - During washing of clothes, we use indigo due to its
Proper pigmental composition
85 - Electrical Pressure is also called
Voltage
86 - Electromagnetic waves are transverse in nature is evident by
Polarisation
87 - Electron microscope works on which of the following principles?
Wave Nature of electrons
88 - Element 106 was discovered by
Seaborg
89 - Energy of Ultraviolet rays is great than
Infrared rays
90 - Energy stored in the nucleus of an atom is called
Nuclear energy
91 - Energy travels from Sun to Earth through
Radiation
92 - Ethanol containing 5% water is known as
Rectified spirit
93 - Fat can be seperated from milk in a cream seperator because of :
Centrifugal Force
94 - Fertiliser having high nitrogen content is :
Ammonium nitrate
95 - Fibre optics work on the principle of
Total internal reflection
96 - For a spontaneous chemical process, the free energy change is
Negative
97 - For accurate scientific work, temperatures are often measured by
Platinum resistance thermometers
98 - For which Diode is used ?
Purification
99 - For which one of the following does the centre of mass lie outside the body?
A ring
100 - Force of impact is the force
When the objects meet
101 - Forged documents are detected by
Ultraviolet rays
102 - Freon used as refrigerant is chemically
Chlorofluoro hydrocarbon
103 - Friction can be reduced by changing from
Sliding to Rolling
104 - Frictional force acts in
The opposite direction of the motion
105 - Galvanization is the :
Deposition of zinc on iron
106 - Gamma rays have greatest similarity with
X-rays
107 - Global warming may result in
All of the above
108 - Good conductor of electricity is
Graphite
109 - Hamburger effect is otherwise known as–
Chloride shift
110 - Heat from the sun reaches earth by the process of
Radiation
111 - Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
Convection
112 - Heat transfer by radiation mainly depends upon
All of the above
113 - Heating of a ore below its melting point in the absence of air is known as
Calcination
114 - Heavy water is used in nuclear reactor to
Increase speed of neutron
115 - Helium gas is used in gas balloons instead of hydrogen gas because it is
Non-combustible
116 - Highly toxic gas which causes headache, visual difficulty, paralysis and even death is
CO
117 - Holography is a technique of
Recording a permanent three dimensional photograph of a given single colour or a multicolour
118 - Hot water is poured simultaneously in four metallic tumblers painted outside with different points. After some time the water will be found to have cooled most in the tumbler painted.
Rough black
119 - How many bottles of water is a gallon?
8
120 - How many laws of physics are there?
3
121 - How many neutrons are there in 92U238 atom ?
146
122 - Hydrochloric acid is also known as
Muriatic acid
123 - Ice is packed in saw dust because
Saw dust is poor conductor of heat.
124 - If a boy sitting in a train, which is moving at a constant velocity, throws a ball straight up into the air, the ball will
Fall into his hand
125 - If an object moves with constant velocity,
It must have constant speed in constant direction
126 - If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?
0.044444444444
127 - If lift is going up with acceleration, the apparent weight of a body is
More than the true weight
128 - If lime water is kept in the air, it turns milky due to presence of :
Carbon dioxide
129 - If the diameter of a capillary is doubled, then the rise of water in it will be
Half
130 - If the length of a simple pendulum is halved then its period of oscillation is
Decreased by a factor 2
131 - If there were no gravity, which of the following will not be there for a fluid?
Upward Thrust
132 - If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same:
Momentum
133 - In a nuclear reactor, one of the following is used as a fuel.
Uranium
134 - In a photocell light energy is converted into
Electrical energy
135 - In a vacuum, all electromagnetic waves have the same
Velocity
136 - In AC circuits, AC meters measure
Rms values
137 - In Astrophysics, what name is given to a hypothetical hole in outer space from which stars and energy emerge?
White hole
138 - In case of uniform circular motion, the acceleration is
Variable in magnitude but constant in direction
139 - In drinking water supply, which of the following treatments is not involved
Softening
140 - In electronics what comes under tank circuit ?
Capacity and inductance
141 - In electro-refining, the pure metal is deposited on
Cathode
142 - In general, which is the cause of a sea breeze?
Specific heat
143 - In heating frozen foods in sealed pouches in a microwaves, why do you first poke holes in the pouch?
To prevent the steam pressure from bursting open the pouch
144 - In nuclear reactor, heavy water is used as
Moderator
145 - In superconductors, the energy gap is due to
Electron-phonon interaction
146 - In the atmosphere ultraviolet rays are absorbed by
Oxygen
147 - In the remote control of television, electromagnetic waves used are
Infrared
148 - In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?
Ultraviolet
149 - Inert gases are
Chemically unreactive
150 - Instruments for measuring Solar Radiation?
Pyranometer
151 - Intensity of any wave is proportional to which of the following?
Square of amplitude
152 - 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
153 - It is more difficult to walk on ice than on a concrete road because
There is very little friction between the ice and feet pressing it
154 - Kepler's law of planetary motion states that the square of the time period is proportional to the
Cube of the semi-major axis
155 - KMnO4 can be used as
Disinfectant
156 - Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
will not rise
157 - Lightning is produced when
Strong opposite charges in different clouds break down the resistance offered by the intervening air
158 - Liquid Nitrogen boils at
77 kelvin
159 - London smog is found in
Winter during morning time
160 - Lux is the SI unit of
intensity of illumination
161 - Lux is the SI unit of
Intensity of illumination
162 - Magnalium is an alloy of
Aluminium and Magnesium
163 - Magnetic field lines about a current-carrying wire
Circle the wire in closed loops
164 - Magnetic keepers are pieces of
Soft iron
165 - Magnetism in materials is due to
Circular motion of electrons
166 - Magnetite is
Fe3O4
167 - Magnifying Glass is basically a
Convex lens
168 - Main pollutant present in automobile exhaust is
CO
169 - Man dies in the atmosphere of CO, because it
Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
170 - Materials for rain proof coats and tents owe their water proof properties to
Surface tension
171 - Materials for rain-proof coats and tents owe their water-proof properties to
surface tension
172 - Materials that usually are good conductors of electricity?
Aluminium
173 - Matter waves are
De Broglie waves
174 - Metals are good conductors of electricity because:
They contain free electrons.
175 - Methanoic and ethanoic acids can be distinguished by the action of
Tollen's reagent
176 - Milk tastes sour when it is left in open for some time. This happens due to the formation of
Lactic acid
177 - Modem is used mostly for ?
Connecting to internet
178 - Momentum is measured as the product of :
Mass and velocity
179 - Most commonly used bleaching agent is
Chlorine
180 - Most poisonous pollutant in water is
Arsenic
181 - Name the process by which bubbles from liquid are formed?
Effervescence
182 - Negative acceleration is in the opposite direction of:
Velocity
183 - Nitrogen forms a variety of compounds in all oxidation states ranging from
–3 to +5
184 - Number of lattices in the orthorhombic system is
7
185 - Ocean currents are an example of
Convection
186 - Of the following which one pollutes the air of a big city ?
Lead
187 - Of the following, which one pollutes the air of a big city ?
Lead
188 - On a rainy day, small oil films on water show brilliant colours. This is due to
interference
189 - On which day 'National Science Day' is celebrated in India ?
44620
190 - One billionth of a second is called
Nanosecond
191 - One can distinguish a telescope from a microscope by observing
Length and size of the lens
192 - Optical fiber works on the principle of
Total internal reflection
193 - Optical fibre works on which of the following principle of light?
Total internal reflection
194 - Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
Impulse and moment of force
195 - Out of the following, which is not emitted by radioactive substance?
Neutrons
196 - Outside of cooking utensils are generally left black from below because
Black surface is a good absorber of heat.
197 - Oxygen has (+) oxidation number only in
OF2
198 - Oxygen which is vital for life is a product of photosynthesis and comes from
Water
199 - Ozone layer above the surface of Earth provides a shield against
Ultra-violet rays
200 - Ozone layer in the outer atmosphere helps us in
Absorbing UV radiations
201 - Pa(Pascal) is the unit for
Pressure
202 - Phosphorus is kept in water because
Its ignition temperature is very low
203 - Photo chemical smog is a resultant of the reaction among
NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight
204 - Pick out the scalar quantity
Pressure
205 - Pieces of camphor placed on water move about rapidly. This is because of
Surface tension
206 - Planck's constant has the dimensions of :
Energy
207 - Planets do not twinkle because
They are nearer to earth and hence we receive a greater amount of light.
208 - 'Plaster of Paris' is made by partial dehydration of
Gypsum salt
209 - Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
Move towards B
210 - Positive feedback is used in
Oscillators
211 - Pyrethrin used in mosquito coil is obtained from
A seed plant
212 - RADAR is used for:
detecting and locating the position of objects such as Aeroplanes.
213 - Radiocarbon is produced in the atmosphere as a result of
Collision between fast neutrons and nitrogen nuclei present in the atmosphere
214 - Rainbows are produced when sunlight :
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
215 - Rectifiers are used to convert:
Alternating current to Direct current
216 - Red is used as an emergency or danger signal as
Its wavelength is the longest
217 - Red light is used for signals because it has
Long wavelength
218 - Refractive Index of glass with respect to water is
44812
219 - Rotameter is used to measure
Flow of fluids
220 - Second and third class levers are differentiated by
The location of the load
221 - Siphon will fail to work if
The level of the liquid in the two vessels are at the same height
222 - Smog is
A combination of smoke and fog
223 - Soap bubble attains spherical shape due to ________
Surface tension
224 - Sound following a flash of lightning is called
Thunder
225 - Sour taste of ‘Coca Cola' is due to the presence of
Phosphoric acid
226 - Sprayer functions on
Bernouli's principle
227 - Stainless steel is usually made by alloying the steel with
Chromium and nickel
228 - Stars appear twinkling because of ......... of light.
Scattering
229 - Stars appears to move from east to west because
The earth rotates from west to east
230 - Stars in the sky appear to twinkle due to
A series of refractions
231 - Sulphur dioxide level in the atmosphere can be reduced by using
Low - sulphur fuels
232 - Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case wi
3P
233 - Sweat contains water and ________
Salt
234 - Tesla is a unit of magnetic :
Field
235 - The ‘Green House effect' is produced due to the presence of excess amount of
Methane
236 - The “King of Metals†is :
Gold
237 - The acid present in red ants is
Formic acid
238 - The acid rain destroys vegetations because it contains
Sulphuric acid
239 - The acid used in lead storage cells is
Sulphuric acid
240 - The acid used in lead storage cells is
Sulphuric acid
241 - The acid which is secreted by the glands in the stomach wall is
Nitric acid
242 - The anode of a dry cell is made up of
Zinc
243 - The basic reason for the extraordinary sparkle of suitably cut diamond is that
It has a very high refractive index
244 - The Capacity of a communication channel is measured in
Band width
245 - The capacity of a water heater is measured in
Both A & B
246 - The chemical bahaviour of an atom depends upon
The number of electrons orbiting around the nucleus
247 - The chemical name of quartz is
Sodium silicate
248 - The coating of a thin layer of zinc on steel or iron objects is known as
Galvanising
249 - The combined gas law relates which of the following?
Volume, Temperature & Pressure
250 - The complete form of 'IC' in electronics is
Integrated circuit
251 - The compound used in prickly heat powder to prevent excessive sweating is
Boric acid
252 - The constituents of automobile exhaust that can cause cancer is/are :
Lead
253 - The cooling by a desert Cooler is based on:
Evaporative Cooling
254 - The depletion of Ozone layer is mainly due to
Chlorofluorocarbons
255 - The device which transfer the signal from low resistance region to high resistance region is
Transistor
256 - The dimension MLT–2 corresponds to
Force
257 - The distance between node and adjacent antinode is 30 cm. The wavelength is
60 cm.
258 - The domain theory of magnetism applies to
Cobalt
259 - The elements in the modern Periodic table are arranged according to their
Atomic number
260 - The energy emitted by the Sun is due to
Nuclear fusion
261 - The energy of a photon varies directly with its
Frequency
262 - The enzyme that converts glucose to ethyl alcohol is :
Zymase
263 - 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
264 - The first metal used by a man was
Copper
265 - The flux commonly used in brazing is
Borax
266 - The force that generates wind is
Pressure gradient force
267 - The force which makes a vehicle to stop when break is applied is called
Frictional force
268 - The frequency of direct current is ________
Zero
269 - The frequency used in TV and radar system lies in
UHF
270 - The function of skimming tank in sewage treatment is to remove
Oil and fatty substances
271 - The Fungus which is used in the alcohol industry is
Yeast
272 - The gas involved in Bhopal incident was
Methyl isocyanate
273 - The gas that causes suffocation and death when coal or coke is burnt in a closed room is
Carbon monoxide
274 - The gas used for artificial fruit ripening of green fruit is
Ethylene
275 - The gas used for artificial ripening of green fruit is
ethylene
276 - The gas used for filling weather balloons is
Helium
277 - The gas used to extinguish fire is
Carbon dioxide
278 - The hair of shaving brush clings together when removed from water due to
Surface tension
279 - The heat energy produced when the human body metabolises 1 gram of fat is
39 KJ
280 - The high reactivity of fluorine is due to
its high electro negativity
281 - The hottest part of the gas flame is known as
Luminous zone
282 - The increasing abundance of green house gases in atmosphere has led to the following effect except
Oxygen fertilization effect
283 - The inert gas used as beacon light is
Ne
284 - The inherited traits of an organism are controlled by
DNA molecules
285 - 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
286 - The iron ore magnetite consists of
Fe2O3
287 - 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
288 - The laws of electrolysis are given by
Faraday
289 - The lift of an aeroplane is caused by
Bernouli's theorem
290 - The liquid waste from kitchens and baths, of residences is known as :
Sullage
291 - The luster of a metal is due to
presence of free electrons
292 - The main chemical constituent of clay is
aluminium silicate
293 - The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
cineole
294 - The main use of salt in the diet is to
produce in small amounts the hydrochloric acid required for the digestion of food
295 - The major constituent of air is
nitrogen
296 - The material used in solar cells contains
Silicon
297 - The material used in the fabrication of a transistor is
Silicon
298 - The metal ion present in Vitamin B12 is
Cobalt
299 - The metal present in vitamin B12 is
Co
300 - The metal used to make lightning conductors is
Copper
301 - The method of magnetisation is:
Hammering a magnet
302 - The mineral containing both magnesium and calcium is
dolomite
303 - The minimum energy required for an effective collision is
Activation energy
304 - The modulus of rigidity is the ratio of
Shearing stress to shearing strain
305 - The molecule which has the highest percentage of ionic character among the following is
HF
306 - The monomer of polythene is
ethylene
307 - The most abundant element is
Oxygen
308 - The most abundant inert gas in the atmosphere is
Argon
309 - The most malleable metal is
gold
310 - The most pure form of Carbon among the options is
Anthracite
311 - The most suitable unit for expressing nuclear radius is :
Angstrom
312 - The most volatile of the given liquids is
Liquid He
313 - The motion of a body that repeats itself after a regular interval of time is
A periodic motion
314 - The noble gas used in radiotherapy is
Radon
315 - The nuclear particle having no mass and no charge, but only spin is
Neutrino
316 - The number of neutrons present in an element having mass number 226 and atomic number 88 is :
138
317 - The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
6.023 x 1019
318 - 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
319 - The ore which is found in abundance in India is
monazite
320 - The orientation of an atomic orbital is governed by
Magnetic quantum number
321 - The oxidation number of nickel in K4[Ni(CN)4] is
Zero
322 - The paramagnetic theory of magnetism applies to
Platinum
323 - The part of the eye having the largest refractive index is :
Lens
324 - The primary agent of contact metamorphism is
Temperature
325 - The process which does not evolve CO2 in air is
Photosynthesis
326 - The purest form of water in nature is
Rain water
327 - The quantity that is not conserved in an inelastic collision is
Kinetic Energy
328 - The radiation initially produced in fluorescent tube is
Ultraviolet
329 - The redness in atmosphere at Sunrise and Sunset is due to :
Scattering of light
330 - The resistance of a conductor is inversely proportional to its:
Area of cross section
331 - The rusting of iron is a/an
Electrochemical change
332 - The sewage obtained from water closets and urinals is known as
Sanitary waste
333 - The size of gear is usually specified by
Pitch circle diameter
334 - The sky appears blue because
The atmosphere scatters blue colour more than the others
335 - The sky appears blue due to
Rayleigh scattering
336 - The slope of a velocity-time graph represents
Acceleration
337 - The source of energy that causes the least global warming is
Geothermal energy
338 - The sparkling of a diamond is due to
Total internal reflection of light
339 - The speed of sound in air depends on
Temperature
340 - The spoon dropped by an astronaut in a satellite will
Continue to follow the motion of the satellite
341 - The strongest acid of the following is
P-nitrophenol
342 - The temperature at which water boils depends mainly on
Air Pressure
343 - The temperature of oxy-acetylene flame is around
4000°C
344 - The term 'brown air' is used for
Photochemical smog
345 - The term ''Higgs Boson' is associated with
God Particle
346 - The term ''Isoneph' indicates the lines of equal
Cloudiness
347 - The three elements most needed in common fertilisers are :
Nitrogen, Potassium and Phosphorous
348 - The three famous law of Kepler is related to
Planetary Motion
349 - The threshold frequency is the frequency below which :
Photo electric emission is not possible
350 - The total energy of revolving electron in an atom
Can never be positive
351 - The two metal ions that cause hardness to water are:
Calcium, Magnesium
352 - The wave theory of light can explain
Interference of light
353 - The waves used in sonography are
Ultrasonic waves
354 - The work done by the string of a simple pendulum during one complete oscillation is equal to
Zero
355 - The working of the quartz crystal in the watch is based on the
Piezo - electric Effect
356 - Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
0
357 - Two stones of different masses are dropped simultaneously from the top of a building
Both the stones reach the ground at the same time
358 - Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by
Ozone
359 - Vehicles use ________ to see the objects coming from behind.
Convex lens
360 - Water cannot be used to extinguish fire caused by electric current, because
It may cause electrocution
361 - Water drops cannot stick to the oily surface due to
Surface tension
362 - Water gas is the combination of
CO and H2
363 - Water gas is the mixture of
Carbon monoxide and hydrogen
364 - 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
365 - Waves that are required for long distance wireless communication are
Radio waves
366 - Weight of a body is maximum at the:
Pole
367 - What are the major pollutants of cigarette smoke?
Carbon monoxide and nicotine
368 - What are the number of moles of CO2 which contains 16 g of oxygen?
0.5 mole
369 - What are the particles emitted by radioactive element after 3 consecutive disintegration?
2 beta 1 alpha
370 - What does the slope of a velocity time graph represent?
Acceleration
371 - What is a common name for the substance which irritates lachrymal glands ?
Tear Gas
372 - What is a compound microscope?
A microscope that has two sets of lenses : an occular lens and an eyepiece.
373 - What is colour of light related to ?
Amplitude
374 - What is found in frequency modulation ?
Fixed frequency
375 - What is 'milk of magnesia' chemically?
Magnesium hydroxide
376 - What is the chemical symbol of mercury?
Hg
377 - What is the covalency of nitrogen in ammonia molecule
3
378 - What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?
12
379 - What is the force of attraction between any two bodies by virtue of their masses is called?
Gravitational Force
380 - What is the fundamental unit of amount of a substance?
Mole
381 - What is the most common salt in sea water ?
Sodium chloride
382 - What is the name of the device used to convert alternating current into direct current ?
Rectifier
383 - What is the reason for twinkling of stars ?
Atmospheric refraction
384 - What is the SI unit of Power?
Watt
385 - What is the unit of Magnetic Induction?
Henry
386 - What is the unit of relative density?
It has no unit
387 - What is the unit of the physical quantity "Jerk"?
Meter per second cube
388 - What is unit of Astronomical distance ?
Light year
389 - What is unit of Viscosity ?
Newton second per square meter
390 - What type of heat transfer is boiling water?
Convection
391 - What type of simple machine is an axe?
Both A & B
392 - When a bar magnet is cut into two equal halves, the pole strength of each piece –
Remains the same
393 - When a body is accelerated, then the velocity will be also
Increase
394 - When a bond is formed between two atoms, the energy of the system will
Remain the same
395 - When a detergent is added to pure water, its surface tension
Decreases
396 - When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is
Above a certain minimum value irrespective of amount of water in the pail
397 - When does land breeze occur?
Both A & B
398 - When iron rusts, its weight
Increases
399 - When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is
Carbon dioxide
400 - When two ice cubes are pressed together, they join to form one cube. Which one of the following helps to hold them together?
Hydrogen bond formation
401 - Where does hydroelectric energy come from?
Water
402 - Where should a boat compass be mounted?
Away from electrical wiring
403 - Which acid is used in Lead storage battery?
Sulphuric acid
404 - Which among the following coal contains 90 per cent of carbon?
Anthracite
405 - Which best describes how air moves during convection?
Cool air falls down
406 - Which colour has the highest energy?
Violet
407 - Which colour of light shows maximum deviation when passed through a prism ?
Violet
408 - Which gas is used as fire extinguisher ?
Carbon dioxide
409 - Which metal is extracted from sea water?
Magnesium
410 - Which mineral is the ore of aluminium ?
Bauxite
411 - Which of the following alkali metals has highest specific heat?
Lithium
412 - Which of the following are used for accurately measuring very small time intervals ?
Atomic clocks
413 - 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
414 - Which of the following causes adiabatic temperature changes in atmosphere?
Expansion and compression of the air
415 - Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere?
Chlorofluorocarbons
416 - Which of the following colour of light deviates least through the prism?
Red
417 - Which of the following criterion is used for any metal to be used as a cooking material ?
Less thermal conductivity
418 - Which of the following electrodes is used in strongly alkaline solution?
Mercury - mercuric oxide electrode
419 - Which of the following fuels causes minimum environmental pollution?
Hydrogen
420 - Which of the following gases is mixed with oxygen for breathing by divers in aqua lungs?
Nitrogen
421 - Which of the following gases is most toxic ?
Carbon monoxide
422 - Which of the following has least negative electron gain enthalpy?
P
423 - Which of the following instrument is used to measure Soil Water Tension?
Tensiometer
424 - Which of the following is a compound machine?
Bicycle
425 - Which of the following is a device designed to protect electrical devices from voltage spikes?
Surge protector
426 - Which of the following is a metallic ore ?
Galena
427 - Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ?
All the above
428 - Which of the following is a monoatomic gas?
Neon
429 - Which of the following is an example for cantilever beam?
Bridge
430 - Which of the following is not a natural source of air pollution ?
None of the above
431 - Which of the following is not a nitrogenous fetiliser?
Superphosphate
432 - Which of the following is not a transverse wave?
Sound waves
433 - Which of the following is not present in RNA
Thymine
434 - Which of the following is optical illusion?
Mirage
435 - Which of the following is the best fuel in terms of energy released per gram of fuel?
Hydrogen
436 - Which of the following is the petroleum wax ?
Paraffin wax
437 - Which of the following is the unit of Astronomical Distance ?
Metre/sec
438 - Which of the following is used as a lubricant in heavy machines?
Graphite
439 - Which of the following is used as filler in tyre of rubber ?
Carbon black
440 - Which of the following is used in making smoke bombs?
Carbon
441 - Which of the following is used to denature ethanol ?
Methyl alcohol
442 - Which of the following is usually not an air-pollutant?
Nitrous oxide
443 - Which of the following metals can displace copper from copper sulphate solution ?
Iron
444 - Which of the following metals is not a pollutant ?
Aluminium
445 - Which of the following metals is used in Space Crafts to withstand high temperatures ?
Ti
446 - Which of the following metals occurs in free state ?
Lead
447 - Which of the following options correctly explains the term heat budget?
It is the balance between incoming and outgoing radiation
448 - Which of the following pairs of physical quantities have the same dimensions?
Work and Energy
449 - Which of the following parts of the sunlight makes the solar cooker hot ?
Infra red
450 - Which of the following produces highest amount of energy upon oxidation?
Fat
451 - Which of the following properties is found only in ferromagnetic materials ?
Hysteresis
452 - Which of the following supports particle nature of photons ?
Photoelectric effect
453 - Which of these travels in glass with minimum velocity ?
Violet light
454 - Which one among the following is not an electromagnetic wave?
Cathode Ray
455 - Which one amongst the following is not a Green House gas?
Nitrogen
456 - Which one is not a part of Kepler's Law?
Law of speed
457 - Which one is not a pure form of carbon?
Gold
458 - Which one is the most reactive gaseous element?
Flourine
459 - Which one is the purest form of carbon?
Diamond
460 - Which one of the following determines the sharpness of image in a camera ?
The aperture
461 - Which one of the following does not form oxyacid ?
Fluorine
462 - Which one of the following has a maximum tendency to form M3 ion ?
N
463 - Which one of the following is a greenhouse gas ?
Carbon dioxide
464 - Which one of the following is a micro-element ?
Chlorine
465 - Which one of the following is also known as solution ?
A homogeneous mixture
466 - Which one of the following is an ohmic conductor?
Silver
467 - Which one of the following is found in kidney stones?
Calcium oxalate
468 - Which one of the following is not a feature of Indifference Curve?
They are concave to each other
469 - Which one of the following is not a fertilizer?
Calcium sulphate
470 - Which one of the following is not present in cement ?
Alum
471 - Which one of the following is the value of one nanometer?
10-7 cm
472 - Which one of the following is used as a sowing agent in the preparation of soft drinks?
Phosphoric acid
473 - Which one of the following metals is used to galvanise iron ?
Zinc
474 - Which one of the following mineral does not contain oxygen ?
Cryolite
475 - Which one of the following organic compounds has fruity smell?
Ester
476 - Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?
It follows the wave path near the tropopause at elevations of 8 km to 15 km.
477 - Which one of the following vegetable oils is used in the manufacture of paints?
Linseed oil
478 - Which one type of radiation has the longest wave length
Radio Wave
479 - Which physicists is the writer of the book 'A Brief History of Time'?
Stephen Hawking
480 - Which type of fire extinguisher is used for petroleum fire ?
Foam type
481 - Which type of radiations are absorbed by the upper layer of the atmosphere?
Ultraviolet
482 - While ascending a hill, the driver of the vehicle keeps the gear ratio
Either equal to or greater than 1
483 - While catching a ball, a player pulls down his hands to lower the–
Momentum
484 - White phosphorus is generally kept under
Water
485 - Who among the following discovered X-rays?
W.C Roentgen
486 - Who gave black hole theory?
Stephen Hawking
487 - Who modified Bohr's theory by introducing elliptical orbits for electron path?
Sommerfeld
488 - Why does ice covered in sawdust not melt quickly ?
Sawdust is a bad conductor of heat
489 - Why does the sea appear blue in colour?
Scattering of the sunlight by water molecules
490 - 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
491 - Zone refining is used for the purification of
Ge
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