1 - Reaction which proceeds in both directions is called
reversible
2 - A specie with maximum number of unpaired electrons.
NH-2
3 - According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be
Trigonal bipyramidal
4 - Addition of CH3COOH and CH3COONa gives in water
both b & c
5 - AgCl dissolved with conc (2x10-2) Ksp will be
4 x 10-4
6 - An atom loses or gains electrons to
all are accurate justifications
7 - Any substance which accepts H+ is base favours the concept
Lowrys
8 - At start of reaction the concentration of reactants is
high
9 - Bond order for N2 molecule is
3
10 - Bond will beionic when E.N difference of bonded atom is
Greater than 1.7
11 - By combining n atmic orbitals no. of hybrid orbitals will be
n
12 - By decreasing the pressure the reaction will go to that direction where
volume increased
13 - By the addition of base in waterpH will be
more than 7
14 - Catalyst used to speed up the reaction of ammonia synthesis is
Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
15 - Chemical equilibrium state is
dynamic state
16 - Conjugated base of a weak acid is
strong
17 - Conversion of reactant into product in unit time is called
rate of forward reaction
18 - Elements having high I.P values are
Non metals
19 - Elements of group IA IIA are
Electropositive
20 - Energy of atom in compound is
Lesser than individual
21 - Energy released or absorbed when electrons are added in atom is
Electron affinity
22 - Energy required to remove electron from an atom
Ionization potential
23 - Equilibrium state is achieved quickly by the addition of.
catalyst
24 - For a reaction involving only gases at 25Degree Centigrade the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp?
Kc is equal to Kp if the total moles of reactants and products are equal
25 - Force responsible to hold atoms together in a compound is called
Bond
26 - Geometry of molecule will be pyramidal if the outer post shell of the central atom has
3 bond pair one lone pair
27 - Geometry of simple molecule having sp3 hybrid orbital is
Tetrahedral
28 - Greater shielding effect corresponds to ionization energy value
Lesser
29 - Idea of pH and pOH was put forward by
Sorenson
30 - If a buffer solution of higher pH than seven is to be made we use
Weak acid and its salt with strong base
31 - In a group ionic radii
Increases
32 - In a period electronegativity from left to right
Increases
33 - In a period the atomic radii
Decreases
34 - In case of gases Kc is replaced by
Kp
35 - In O2 each oxygen atom is hybridized
sp2
36 - In which of the following equilibria will Kc and Kp have the same value?
N2 + O2 = 2NO
37 - Ionic bond is produced after complete transfer of
Electrons
38 - Ionization energy in a period generally
Increases
39 - Ka<10-3 means
Very weak acid
40 - Kc value has
Both a & b
41 - Measurement of the degree of polarity is
Dipole moment
42 - Molecular orbital which have higher energy than atomic orbitals is called
Antibonding molecular orbital
43 - Molecular orbitals are filled according to
All these
44 - Mostly ionic compound are produced in between elements of
IA IIA and VIIA
45 - Negative log of mular concentration of H+ ions is called
pH
46 - on sp3 hybridization
One s and 3 p-orbitals are involved
47 - Orbitals of same energy produced after mixing of orbitals of different energy are called
Degenerate orbitals
48 - Pi bonds are produced by overlapping of
Un-hybrid orbitals
49 - Product of charge and distance is called
Dipole moment
50 - Rate expression for ammonia synthesis is
Kc=4x2v2/(a-x)(b-3x)3
51 - Sharing of 1 electron pair by one specie forms
Coordinate covalent bond
52 - Shielding effect across the period
Constant
53 - Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH?
2
54 - Solubility of any salt can be determined from
Ksp
55 - Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called
buffer solution
56 - Temperature for preparation of SO3 is
400-500Degree Centigrade
57 - The geometry of ammonia is
Trigonal Pyramidal
58 - The ionization energy
Generally increases from left to right in a period
59 - The Lewis acids are
Electron deficient
60 - The octet rule does not always hold for which of the following elements
"P"
61 - The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is
7
62 - The pH of human blood is
35
63 - The relative attraction of the nucleus for the electrons in a chemical bond is called
Electro negativity
64 - Unit of dipole moment is
Debye
65 - Unit of Kc is
Kc may or may not have units
66 - Unpaired electron in a molecule gives _________ character.
Paramagnetic
67 - When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called
solubility product
68 - When the value of Kc is very small then
product conc. Is maximum
69 - Which of following is not a base
BF3
70 - Which of the following have their outer most shell complete in atomic form?
Noble gases
71 - Which of the following is the best explanation that CO2 is non polar molecule
Dipole moment is zero
72 - Which of the following will have highest value of electron affinity
Cl
73 - Which of the following will not change the concentration of ammonia at the equilibrium ?
Addition of catalyst
74 - Which of the solid does not contain covalent bond
Copper
75 - Which one has maximum number of unpaired electrons?
7Y
76 - Which one is not the absolute term of the element?
Electro negativity
77 - Which one of the following aqueous solutions will be basic?
Na2CO3
78 - Which one of the following has polar covalent bond?
HF
79 - Which one of the following is a buffer solution?
blood
80 - Which one shows high %age of the ionic character?
HF
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