AP EAMCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
The compound that is used in smoke screens is
- A \(\mathrm{Mg}_3 \mathrm{~N}_2\)
- B \(\mathrm{MgO}\)
- C \(\mathrm{NaN}_3\)
- D \(\mathrm{Ca}_3 \mathrm{P}_2\)
Answer & Solution
Correct Answer
(D) \(\mathrm{Ca}_3 \mathrm{P}_2\)
Step-by-step Solution
Detailed explanation
A smoke screen is a dense cloud of fake smoke used to hide military areas. \(\mathrm{Ca}_3 \mathrm{P}_2+6 \mathrm{H}_2 \mathrm{O} \rightarrow 3 \mathrm{Ca}(\mathrm{OH})_2+2 \mathrm{PH}_3\) \(\mathrm{PH}_3\) spontaneously catches fire to produce \(\mathrm{P}_2 \mathrm{O}_5\) :…
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