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11) When acid is added to pure water at 298 K then:
a) Both (H+) and (OH) ions decreases.
b) Both (H+) and (OH) ions increases.
c) (H+) increases and (OH-) decreases.
d) (H+) decreases and (OH-) increases.
ANSWER : (H+) increases and (OH-) decreases.
12) Buffer of a single salt is prepared by dissolving?
a) Weak acid + weak base in water.
b) Strong acid + strong base in water.
c) Weak acid + strong base in water.
d) Strong acid + weak base in water.
ANSWER : Weak acid + weak base in water.
13) Which among the following is not a property of buffer solution?
a) It has a definite PH.
b) PH remains constant on addition of small amount of acid or base.
c) PH remains constant on keeping for a long time.
d) It does not has a definite PH.
ANSWER : It does not has a definite PH.
14) Which is not an example of sparingly soluble salt?
a) AgCl.
b) BaSO4.
c) CH3COOAg.
d) None of these.
ANSWER : None of these.
15) The concentration of a sparingly soluble salt in its saturated solution
at a given temperature is known as:
a) Solubility product.
b) Solubility.
c) Hydrolysis.
d) Degree of hydrolysis.
ANSWER : Solubility.
16) If ionic product < solubility product then the solution is:
a) unsaturated.
b) just saturated.
c) super saturated.
d) none of these.
ANSWER : unsaturated.
17) Arrange the following in increasing order of acidic strength?
a) HCl < HBr < HI < HF
b) HF < HBr < HCl < HI
c) HI < HCl < HBr < HF
d) HF < HCl < HI < HBr.
ANSWER : HF < HBr < HCl < HI
18) Lewis acid is one that:
a) Accepts an electron pair.
b) Donates a proton.
c) Accepts a proton.
d) Donates an electron pair.
ANSWER : Accepts an electron pair.
19) In the following reaction, which two pairs are Bronsted bases HC2O4-
+ PO43- ? HPO42- + C2O42-.
a) HC2O42- and HPO42-.
b) HPO42- and C2O42-
c) PO43- and C2O42-
d) HC2O42- and PO43-
ANSWER : PO43- and C2O42-
20) HCO3- acts as:
a) Acid.
b) Base.
c) Both acid and base.
d) None of these.
ANSWER : Both acid and base.
Part 1
Part 2 Part 3
Part 4
Part 5
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