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31) What will be the PH of solution obtained by mixing 100ml of 0.8M HCl
and 100ml of 0.6M NaOH.
a) 3
b) 2.5
c) 2
d) 1
ANSWER : 1
32) Which among the following contains same (H+) ions?
a) Equimolar solutions.
b) Equinormal solution.
c) Both a and b
d) None of these.
ANSWER : Equinormal solution.
33) The ionisation of a weak electrolyte increases when the concentration of
the solution is decreased. This relation is given by:
a) Ostwald’s law.
b) Arrhenius equation.
c) Nernst’s equation.
d) Law of mass action.
ANSWER : Ostwald’s law.
34) Acetic acid is a weaker acid than sulphuric acid because:
a) sulphuric acid is strongly ionised.
b) it has low molecular weight.
c) sulphuric acid is weakly ionised.
d) it does not dissociates completely.
ANSWER : it does not dissociates completely.
35) Aqueous solution of potassium chlorate is:
a) amphoteric
b) neutral
c) alkaline.
d) acidic.
ANSWER : neutral
36) The degree of hydrolysis of 0.1M solution of ammonium acetate is 8.48 x
10-5. The dissociation constant of the weak base is:
a) 1.39 x 10-5
b) 1.39 x 10-4
c) 1.45 x 10-10
d) 1.65 x 10-5
ANSWER : 1.39 x 10-5
37) The degree of hydrolysis of 0.015M solution of ammonium nitrate is 1.924
x 10-4. The hydrolysis constant is:
a) 5.55 x 10-5
b) 2.39 x 10-5
c) 5.55 x 10-10
d) 2.39 x 10-10
ANSWER : 5.55 x 10-10
38) What is the dissociation constant of HCN, if the dissociation constant
of NH4OH is 1.75 x 10-5 and the hydrolysis constant of NH4CN
is 7.93 x 10-1?
a) 7.2 x 10-5
b) 6.6 x 10-10
c) 7.2 x 10-10
d) None of these
ANSWER : 7.2 x 10-10
39) Precipitation of salt occurs if:
a) Ionic product = solubility product
b) Ionic product > solubility product
c) Ionic product < solubility product
d) None of these.
ANSWER : Ionic product > solubility product
40) Addition of HCl will suppress the ionisation of:
a) Benzoic acid
b) Carbonic acid
c) Nitric acid
d) Both a and b
ANSWER : Both a and b
Part 1
Part 2 Part 3
Part 4
Part 5
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