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Per NCERT §6.12.5 (common-ion effect), addition of CH₃COONa to a solution of CH₃COOH does what to the degree of ionisation of acetic acid?
ALeaves it unchanged
BSets it to 100%
CDecreases it
DIncreases it
Answer & Solution
Correct answer: C. Decreases it
NCERT §6.12.5: common-ion (acetate from salt) shifts CH₃COOH ⇌ H⁺ + CH₃COO⁻ to the left, suppressing ionisation.
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