Chemistry
Grade-8
Easy
Question
Identify the fuel used in the following:
- Liquid oxygen
- Liquid hydrogen
- Both a and b
- Liquid nitrogen
Hint:
Both a and b
The correct answer is: Both a and b
The Rockets mean engines use a combination of liquid hydrogen and liquid oxygen. Hydrogen has the lowest molecular weight of any substance, making it ideal for keeping the weight of a rocket relatively small. When combined with liquid oxygen, hydrogen creates the most efficient thrust of any rocket propellant.
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For the given reaction, match column I with column II and mark the correct option from the codes given below.
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Select the most appropriate answer from the options given below:
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(i) 
(ii) 
(iii) 
(iv) 
Options:
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(i)
(ii)
(iii)
(iv)
Options:
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