1. List chemical properties of hydrogen
2. why hydrogen is considered as a clean fuel.

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Solution

At standard temperature and pressure, hydrogen is a nontoxic, nonmetallic, odorless, tasteless, colorless, and highly combustible diatomic gas with the molecular formula H2. Hydrogen is also prevalent on Earth in the form of chemical compounds such as hydrocarbons and water.
When hydrogen burns in air, it produces nothing but water vapor. It is therefore the cleanest possible, totally nonpolluting fuel

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Question 2
Hydrogen has been used as a rocket fuel. Would you consider it as a cleaner fuel than CNG? Why or why not?

Hydrogen has three isotopes written as: $_{1}^{1} H,_{1}^{2} H,_{1}^{3} H$

Explain why:

(i) these isotopes have almost identical chemical properties.

(ii) they are electrically neutral.

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