COMEDK · Chemistry · 13. General Organic Chemistry

Which of the following statements is not true?

A Acetic acid is stronger than chloro acetic aci(d)
B Formic acid is the strongest of all aliphatic monocarboxylic acids.
C Benzoic acid is stronger acid than acetic aci(d)
D Propanoic acid is weaker than acetic aci(d)

Verified Solution

Answer & Solution

Correct Answer

(A) Acetic acid is stronger than chloro acetic aci(d)

Step-by-step Solution

Detailed explanation

Statement (a) is incorrect and can be corrected as, chloro acetic acid is stronger than acetic acid due to - I-effect of chloro group which leads to stabilisation of carboxylate ion.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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