Multiple choice

A mixture of paraffin and potassium nitrate is used as

  1. solid propellants

  2. hybrid propellant

  3. liquid propellants

  4. All of the above

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A Correct answer
Explanation

Solid propellants are a mixture of solid hydrocarbon and an oxidising agent. This oxidising agent is stable at room temperature. For example, a mixture of paraffin and potassium nitrate..Paraffin is the solid hydrocarbon and KNO3 acts as the oxidising agent.