Lewisite a war gas is obtained by the action of acetylene on :

C O C l_{2}

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S O C l_{2}

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A s C l_{3}

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A l C l_{3}

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Solution

The correct option is C $A s C l_{3}$
The compound is prepared by the addition of arsenic trichloride to acetylene in the presence of a suitable catalyst:

$A s {C l}_{3} {+ C}_{2} H_{2} ⟶ C l C H C H A s {(C l)}_{2}$
Lewisite formula

$A s {C l}_{3}$ is added to acetylene.

Option C is correct.

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