Multiple choice

Which of the following is an example of a biliquid propellant?

  1. Alcohol and N2O4

  2. Nitroglycerine and nitrocellulose

  3. Nitromethane and H2O2

  4. All of these

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A Correct answer
Explanation

Biliquid propellants use two separate liquid components (fuel and oxidizer) stored in different tanks and mixed at combustion. Alcohol (fuel) and N₂O₄ (oxidizer) fit this. Nitroglycerine and nitrocellulose form double-base solid propellants, not biliquid.