Question

Which of the following is a weak electrolyte ?
A. carbonic acid
B. sodium hydroxide
C. copper sulphate
D. nitric acid

Answer 1

Answer:

Carbonic acid

Explanation:

Because it does not completely dissociate into aqueous solution.

Answer 2

A. Carbonic acid is a weak electrolyte.

Explanation:

• In electrolysis, water soluble salt is used as electrolyte.
• When electric current is passed through electrode, then there is ionization of electrolyte. According to dissociation of ions, there are two types of electrolyte.
• One is strong electrolyte in which ionization takes place completely where another is weak electrolyte in which only partial ionization takes place.
• The dissociation of carbonic acid is given below:

$\mathrm{H}_{2} \mathrm{CO}_{3} \rightleftarrows \mathrm{HCO}_{3}^{-}+\mathrm{H}^{+}$

• Here double arrow is used to indicate the equilibrium between product and reactant.