Question

Which of the following conducts electricity in a solution?

• A. Electrolytes
• B. Non-electrolytes
• C. H$_2$O molecules
• D. Copper wire

Hint:

Strong electrolytes (e.g., NaCl, HCl) conduct better than weak electrolytes (e.g., CH$_3$COOH) due to higher ionization.

Answer 1

The Correct Option is A

Step 1: Key idea.
Electric conduction in solutions occurs via movement of ions. Substances that produce ions in solution are called electrolytes.
Step 2: Check options.
(A) Electrolytes: Dissociate to give ions $\Rightarrow$ conduct.
(B) Non-electrolytes: Do not ionize $\Rightarrow$ do not conduct.
(C) H$_2$O molecules: Pure water has extremely low conductivity.
(D) Copper wire: Conducts as a solid metal, not “in solution.”
Step 3: Conclusion.
Therefore, electrolytes conduct electricity in solution.