A) Alcohol
B) Acrylic rubber
C) Hydrazine
D) Polyurethane
E) Ammonium perchlorate
Correct Answer: E
Solution :
A propellant is a combination of an oxidiser and a fuel. Among the given only ammonium perchlorate is used as an oxidiser (solid oxidiser) while other are generally used as a fuel in rocket propellant.
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