Multiple choice

Which one of the following is an example of a composite rocket propellant?

  1. Polyurethane, ammonium perchlorate and Al

  2. Polyurethane, ammonium chloride and Mg

  3. Polyurethane, ammonium hydroxide and Al

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Composite solid propellants contain fuel (aluminum powder), oxidizer (ammonium perchlorate), and binder (polyurethane) in a heterogeneous mixture. Ammonium chloride is not a proper oxidizer, and ammonium hydroxide is not a solid oxidizer.

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