Questions
Which is used to produce smoke screens?
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By Expert Faculty of Sri Chaitanya
a
Zinc sulphide
b
Calcium phosphide
c
Zinc phosphide
d
Sodium carbonate
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Correct option is B
Smoke screen is a mass of dense artificial smoke used to conceal military areas or operations from an enemy. It is produced by calcium phosphideCa3P2 + 6H2O → 3Ca(OH)2 + 2PH3Similar Questions
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