Question

Identify from following a weak electrolyte based on their dissociation nature in aqueous medium.

• A. \(\text{NH}_3\)
• B. \(\text{NaOH}\)
• C. \(\text{KOH}\)
• D. \(\text{HI}\)

Hint:

Strong bases and strong acids ionise fully; ammonia ionises only slightly.

Answer 1

The Correct Option is A

Step 1: Classify each:
Strong electrolytes: NaOH, KOH (strong bases) and HI (strong acid). Their solutions conduct well at all concentrations because of full ionisation.

Step 2: Ammonia:
$\text{NH}_3$ takes a proton from water only partially, leaving most molecules unchanged. Its conductivity is low at equal concentration.

Step 3: Result:
The only weak electrolyte is $\text{NH}_3$, option (A).

Final Answer:
NH3 is the weak electrolyte. \[ \boxed{\text{(A) }\text{NH}_3} \]