Assertion: Conductivity of 0.1 M CH₃COOH solution is less than 0.001 M CH₃COOH solution.

Reason: Dilution increases the degree of ionization of CH₃COOH.

Assertion and Reason both are correct statements and reason is the correct explanation for assertion.

The answer is 1. Assertion and Reason both are correct statements and reason is the correct explanation for assertion.

The assertion is correct because the conductivity of a 0.1 M solution of acetic acid is less than the conductivity of a 0.001 M solution of acetic acid. This is because the concentration of the ions in the 0.001 M solution is lower, which means that there are fewer ions that can conduct electricity.

The reason is also correct because dilution increases the degree of ionization of acetic acid. This is because acetic acid molecules are more likely to dissociate into ions when they are surrounded by fewer other molecules.

Therefore, both the assertion and the reason are correct, and the reason is the correct explanation for the assertion.