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Question

Chemistry Question on p -Block Elements

The material used in warfare in making smoke screens for military purposes is:

A

PH3P{{H}_{3}}

B

PCl5PC{{l}_{5}}

C

SiCl4SiC{{l}_{4}}

D

NH3N{{H}_{3}}

Answer

PH3P{{H}_{3}}

Explanation

Solution

Phosphine (PH3)\left( PH _{3}\right) when comes in contact with air, to forms vortex rings of P2O5P _{2} O _{5} in the forms of white smoke. Hence, it is used to prepare smoke screen in warfare.