The substance used as a smoke screen in warfare is A C<sub>2</sub>H<sub>2</sub> B SiCl<sub>4</sub> C P<sub>2</sub>O<sub>5</sub> D PCl<sub>5</sub> The substance used as a smoke screen in warfare is Correct Answer SiCl<sub>4</sub> Bissoy MCQ Team Chemical Engineering Chemical Engineering Basics