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

1 Hard

1 of 1

Analyzing +4 | -1

(i)

\mathrm{F}_3 \mathrm{C}-\mathrm{COOH}

(ii)

\mathrm{CH}_3-\mathrm{COOH}

(iii)

\mathrm{C}_6 \mathrm{H}_5-\mathrm{COOH}

(iv)

\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}

Correct order of

\mathrm{pK}_{\mathrm{a}}

value is:

View answer and explanation

Correct option: B

>

>

iii

>

Option B (iv > ii > iii > i) is correct because the pKa value increases with decreasing acidity. Electron-withdrawing groups increase acidity, thus decreasing pKa.

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p

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\quad \quad

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\quad

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