In the following reaction:HC equiv CH xrighta | vedclass

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(C) The reaction of ethyne $(HC \equiv CH)$ with $H_2SO_4$ in the presence of $Hg^{2+}$ is a hydration reaction (Kucherov reaction).$HC \equiv CH + H_

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Victor Meyer test

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(C) The reaction of ethyne $(HC \equiv CH)$ with $H_2SO_4$ in the presence of $Hg^{2+}$ is a hydration reaction (Kucherov reaction).$HC \equiv CH + H_2O \xrightarrow[{Hg^{2+}}]{{H_2SO_4}} CH_3CHO$ (Acetaldehyde).Thus,product $'P'$ is acetaldehyde $(CH_3CHO)$.$1$. Acetaldehyde gives a positive Tollen's reagent test (silver mirror test).$2$. Acetaldehyde gives a positive Brady's reagent test ($2$,$4$-$DNP$ test) as it is an aldehyde.$3$. Acetaldehyde gives a positive Iodoform test because it contains the $CH_3CO-$ group.$4$. The Victor Meyer test is used to distinguish between primary,secondary,and tertiary alcohols,not aldehydes. Therefore,acetaldehyde will not give the Victor Meyer test.

In the following reaction:
$HC \equiv CH \xrightarrow[{Hg^{2+}}]{{H_2SO_4}} 'P'$
Product $'P'$ will not give:

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In the following reaction:$HC \equiv CH \xrightarrow[{Hg^{2+}}]{{H_2SO_4}} 'P'$Product $'P'$ will not give: