Question

The best conductor of electricity is a $1M$ solution of :

• A. boric acid
• B. acetic acid
• C. $H_{2}S{O}_4$
• D. phosphoric acid

Answer 1

The correct option is D phosphoric acid

In phosphoric acid - $H_{3}P{O}_4\to 3H^{+}+P{O}_4^{3-}$

In sulphuric acid - $H_{2}S{O}_4\to 2H^{+}+S{O}_4^{2-}$

Phosphoric acid has the maximum number of ions, therefore it is the best conductor of electricity.

Hence, option C is correct.