Question

The molar conductivity for electrolytes A and B are plotted against C^1/2 as shown below. Electrolytes A and B respectively are :

• A.

  A	B
  Weak electrolyte	Weak electrolyte

• B.

  A	B
  Strong electrolyte	strong electrolyte

• C.

  A	B
  Weak electrolyte	strong electrolyte

• D.

  A	B
  Strong electrolyte	Weak electrolyte

Answer 1

The Correct Option is C

Explanation: The graph shows the variation of molar conductivity (\( \Lambda_m \)) with \( C^{1/2} \), the square root of concentration:

1. Electrolyte A: The molar conductivity of \( A \) increases steeply as \( C^{1/2} \) approaches 0, indicating \( A \) is a weak electrolyte. For weak electrolytes, the molar conductivity increases significantly with dilution due to ionization.
2. Electrolyte B: The molar conductivity of \( B \) remains relatively constant with \( C^{1/2} \), indicating \( B \) is a strong electrolyte. For strong electrolytes, the variation of molar conductivity with concentration is minimal.

Therefore:

Electrolyte A → Weak electrolyte, Electrolyte B → Strong electrolyte.

Final Answer is Option (3).