First slide

Alkynes

Question

Lewisite can be prepared by using which of the following combinations

Moderate

A

Acetylene and ${AsCl}_{3}$
B

Acetylene and ${SbCl}_{3}$
C

propyne and ${SbCl}_{3}$
D

propyne and ${AsCl}_{3}$

Solution

Lewisite is a poisonous gas used as a chemical weapon. It acts as a Vesicant (blister agent) and Lung irritant. Lewisite is an addition product of Acetylene and ${AsCl}_{3}$
$HC \equiv {CH + AsCl}_{3} \overset{{AlCl}_{3}}{\to} {Cl-CH}_{} {=CH}_{2} {-AsCl}_{2}$

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