Question

Which of the following are strong electrolytes?

• A. $H_{2}S{O}_4$
• B. $NaOH$
• C. $Urea$
• D. $Benzene$

Answer 1

Answer: (A), (B)

The correct options are
A $H_{2}S{O}_4$
B $NaOH$

As $H_{2}S{O}_4$ is strong acid, it dissociates completely in water. Similarly, NaOH which is strong base dissosiates to give its respective ions, so both are strong electrolytes.
Urea dissociates partially in water so it is a weak electrolyte.
Whereas benzene doesn’t dissociate at all, hence, it is a non-electrolyte.