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NEET UG CHEMISTRY MCQ: P-BLOCK ELEMENTS

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The substance used as a smokescreen in war fare is
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Correct option: B
PH3P{H_3}
Option A (SiCl4SiC{l_4}) is correct because silicon tetrachloride reacts with moisture in the air to produce HCl fumes and silica, creating a dense white smoke.

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