1) Among the following which is not classified as acid:

a) Plant ash.
b) Tamarind.
c) Citrus fruits.
d) All of these.

ANSWER : Plant ash.

2) The dissociation and ionization are partically same as both results in giving …………… of the substance. 

a) Free cations only.
b) Free anions only.
c) Both free cations and anions.
d) None of the above.

ANSWER : Both free cations and anions.

3) Base is a substance whose solution in water:

a) Has bitter taste.
b) Conducts electricity.
c) Feels soapy to touch.
d) All of the above.

ANSWER : All of the above.

4) Which statement is not correct for acids?

a) It produces H⁺ ions in aqueous medium.
b) It can donate a proton to another substance.
c) It can accept a proton from another substance.
d) All of the above.

ANSWER : It can accept a proton from another substance.

5) Among the following which property is shown by a strong electrolyte?

a) Low degree of ionization.
b) High value of equilibrium constant.
c) Obeys Ostwald’s dilution law.
d) Shows low conductivity.

ANSWER : High value of equilibrium constant.

6) Degree of dissociation is nearly equal to 1 for:

a) Weak acids and weak bases.
b) Strong acids and weak bases.
c) Weak acids and strong bases.
d) Strong acids and strong bases.

ANSWER : Strong acids and strong bases.

7) The degree of dissociation does not depend upon:

a) Pressure.
b) Temperature.
c) Nature of solute.
d) Nature of solvent.

ANSWER : Pressure.

8) According to the Ostwald’s dilution formula, the degree of dissociation of a weak electrolyte is:

a) Directly proportional to square root of dilution of its solution.
b) Inversely proportional to square root of concentration of its solution.
c) None of these.
d) Both a and b.

ANSWER : Both a and b.

9) Why pure water is very weak electrolyte?

a) It ionizes to a large extent.
b) It ionizes to very small extent.
c) It does not ionizes at all.
d) It ionizes completely.

ANSWER : It ionizes to very small extent.

10) Water molecule is a highly polar solvent due to:

a) Presence of two lone pair of electrons.
b) Presence of three lone pair of electrons.
c) Absence of lone pair of electrons.
d) None of these.

ANSWER : Presence of two lone pair of electrons.     

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