1.

Explain the two types of propellant.

Answer»

1. Liquid propellants: 

  • Fuel and oxidisers are combined in a combustion chamber where they bum and come out from the base of the rocket with a great force. 
  • Liquid hydrogen, hydrazine and ethyl alcohol are the liquid fuels. 
  • Some of the oxidizers are oxygen, ozone, hydrogen peroxide and fuming nitric acid.

2. Solid propellants :

  • Fuel and oxidiser compounds are already combined. 
  • When they are ignited they bum and produce heat energy. 
  • Combustion of solid propellants cannot be stopped once it is ignited. 
  • Solid fuels used in rockets are polyurethanes and polybutadienes. Nitrate and chlorate salts are used as oxidizers.


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