The variation of molar conductivity with concentration of n electrolyte (X) in aqueous solution is shown in the given figure.

The electrolyte X is:

CONCEPT:

Molar Conductivity of Electrolytes

• Molar conductivity (Λ_m) is the conductance of all the ions produced by one mole of an electrolyte in a given solution.
• It varies with the concentration of the electrolyte, usually increasing as concentration decreases due to ion-ion interactions.
• For strong electrolytes, molar conductivity increases slightly with dilution because ions are already well dissociated.
• For weak electrolytes, molar conductivity increases significantly with dilution as more ions dissociate.

EXPLANATION:

• The given figure shows the variation of molar conductivity with concentration.
• For strong electrolytes like HCl and NaCl, the increase in molar conductivity with dilution is relatively small.
• For weak electrolytes like CH₃COOH (acetic acid), the increase in molar conductivity with dilution is more pronounced due to increased ionization.
• The given figure likely shows a significant increase in molar conductivity with dilution, indicating that the electrolyte X is a weak electrolyte.
• Among the given options, CH₃COOH is the weak electrolyte.

Therefore, the electrolyte X is CH₃COOH.