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Which reactions yield a carboxylic acid

This type of question, asked 2 times: 2021 Paper 21, 2 Apr 2025. All 2 questions below, oldest first.

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  1. Question 1

    2021 Paper 21

    38
    Which one of the following reactions will not yield propionic acid?

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  2. Question 2

    2 Apr 2025

    109
    Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ? (A) R−C≡NR - C \equiv N →(i)H+/H2Omild Condition\underset{mild\ Condition}{\overset{{(i)H}^{+}/H_{2}O}{\rightarrow}} (B) R−MgX→(i)CO2(ii)H3O+R - \underset{(ii)H_{3}O^{+}}{MgX\overset{(i){CO}_{2}}{\rightarrow}} (C) R−C≡N→(i) SnCl2/HCl  (ii) H3O+ R - C \equiv N\underset{\text{~(ii)~}H_{3}O^{+}\ }{\overset{\text{(i)~}{SnCl}_{2}/HCl\ }{\rightarrow}} (D) R−CH2−OH→PCC R - {CH}_{2} - OH\overset{PCC\ }{\rightarrow} (E) R−COCl→(i) H2/Pd−BaSO4(ii) Br2 waterR - COCl\underset{\text{(ii)~}{Br}_{2}\text{~water}}{\overset{\text{(i)~}H_{2}/Pd - {BaSO}_{4}}{\rightarrow}} Choose the correct answer from the options given below :

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