Which of the following could be used as fuel in propellant or rockets ?
1). Liquid Hydrogen + Liquid Nitrogen
2). Liquid Oxygen + Liquid Argon
3). Liquid Nitrogen + Liquid Oxygen
4). Liquid Hydrogen + Liquid Oxygen
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1. The chiefsource for the production of nitrogeneous fertilizers is :
2. The Latin word formica means ant. The name formic acid is derived from this Latin word because
3. The boiling point of liquids vary as
4. A subshell with l = 2 can take up
5. Greenhouse effect is caused by
6. Aluminum can be purified by
7. An emulsion is a colloid of a
8. By which organic compound all the oils are known ?