JEE Mains · Chemistry · STD 12 - 8.2 Carboxylic acids and their derivative
The correct decreasing order for acidic strength is
- A \(NO_2CH_2COOH > FCH_2COOH >\) \( CNCH_2COOH > ClCH_2COOH\)
- B \(FCH_2COOH > NCCH_2COOH >\) \(NO_2CH_2COOH > ClCH_2COOH\)
- C \(CNCH_2COOH > O_2NCH_2COOH >\) \(FCH_2COOH > ClCH_2COOH\)
- D \(NO_2CH_2COOH > NCCH_2COOH >\) \(FCH_2COOH > ClCH_2COOH\)
Answer & Solution
Correct Answer
(D) \(NO_2CH_2COOH > NCCH_2COOH >\) \(FCH_2COOH > ClCH_2COOH\)
Step-by-step Solution
Detailed explanation
Acid strength in this case varies directly with the electron withdrawing power of the groups attached to the \(\alpha - \) carbon of \(CH_3COOH\). The order of electron withdrawing tendency is \(NO_2 > CN > F > Cl\)
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