Q.

Aqueous solution of which of the following compounds is the best conductor of electric current            [2015]

1 Hydrochloric acid, HCl  
2 Ammonia, NH3  
3 Fructose, C6H12O6  
4 Acetic acid, C2H4O2  

Ans.

(1)

HCl is a strong acid and dissociates completely into ions in aqueous solution.