The substance used as a smoke screen in warfare is

The substance used as a smoke screen in warfare is
  1. $\mathrm{SiCl}_{4}$
  2. $\mathrm{PH}_{3}$
  3. $\mathrm{PCl}_{5}$
  4. Acetylene

Solution

$\mathrm{SiCl}_{4}$ gets hydrolysed in moist air and gives white fumes which are used as a smoke screen in warfare.

Asked in: JEE-TOPICTESTS-CHEMISTRY

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