Which of the following belongs to $+ I$ group?

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$- OH$

$- COOH$

$- {CH}_{3}$

$- {OCH}_{3}$

answer is D.

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Detailed Solution

$+ I$ Group is electron releasing. The charge is transmitted across a chemical compound's chain when it wants to liberate electrons, like when an alkyl group is added to a hydrocarbon chain. The Positive Inductive Effect, often known as the +I Effect, is this effect.

For instance, the methyl group linked to the carboxylic acid group makes formic acid (HCOOH) more acidic than acetic acid (CH3 COOH) due to the +I inductive effect.

From the given option, only ${CH}_{3}$ has a propensity to emit electrons. As they have a propensity to be received favourably by I groups, $- OH, - {OCH}_{3}$ , and $- COOH$ refer to these groups as I.

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