Q. Which is used to produce smoke screens?
A) Calcium $phosphide$
B) Sodium carbonate
C) Zinc$\ sulphide$
D) Zinc $phosphide$
Explanation
The correct answer is Option A: Calcium $phosphide$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.