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The product formed in the reaction of SOCl₂ with white phosphorus is

$PCl_{3}$

$SO_{2}Cl_{2}$

$SCl_{2}$

$POCl_{3}$

Option A

This problem is based on chemical properties of phosphorus

White phosphorus on reaction with thionyl chloride (SOCl₂) produces phosphorus trichloride

$P_{4}(s)+8SOCl_{2}(l)\rightarrow 4PCl_{3}(l)+4SO_{2}(g)+2S_{2}Cl_{2}(g)$

But if amount of thionyl chloride (SOCl2) is in excess then it produces phosphrous pentachloride.

$P_{4}(s)+10SOCl_{2}(l)\rightarrow 4PCl_{5}+10SO_{2}$

Hence, (a) is the correct choice.

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