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NEET UG CHEMISTRY MCQ: ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES AND TECHNIQUES

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Analyzing +4 | -1
Among the compounds

(i) H−C≡C−COOH,\text{(i) }\mathrm{H}-\mathrm{C} \equiv \mathrm{C}-\mathrm{COOH}, (ii) CH2=CH−COOH,\text{(ii) } \mathrm{CH}_2=\mathrm{CH}-\mathrm{COOH}, (iii) CH3−CH2COOH,\text{(iii) }\mathrm{CH}_3-\mathrm{CH}_2 \mathrm{COOH}, (iv) CH3−CH2−OH\text{(iv) }\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{OH}

The correct of acid strength is
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Correct option: A
(i) >> (ii) >> (iii) >> (iv)
Option A is correct because the acidity increases with the presence of electron-withdrawing groups closer to the carboxylic acid group, with alkynes being more electron-withdrawing than alkenes or alkyl groups, and alcohols being the least acidic.

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