Download App

Universe and Space Science. — Science STD 8 — Question

Tamilnadu BoardEnglish MediumSTD 8ScienceUniverse and Space Science.4 Marks
Question
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.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[4 Mark Questions]" from Universe and Space Science.→Universe and Space Science. — all question types→Science STD 8 question papers→Tamilnadu Board STD 8 question papers→Tamilnadu Board question paper generator→

Similar questions

Explain how friction can be minimized.
→
Explain the Secondary sex characteristics of Boys.
→
Write three properties of metalloids.
→
Speed of light in air is 3 × 108 m s–1 and the refractive index of a medium is 1.5. Find the speed of light in the medium.
→
Write a note on thermostat.
→
What is surface tension? Explain the applications of surface tension.
→
Name six common non-metals and write their symbols.
→
Explain the construction of cathode Ray Tube (CRT) with a diagram.
→
How disease causing microorganisms enter into human beings?
→
What are the uses of coal?
→