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Hydrogen generally forms covalent compounds. Why?
Important Questions on Hydrogen
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Write a chemical equation for the reaction taking place in the flask. Write name and one property of the gas evolved.

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Which of the following statements about hydrogen is incorrect?

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Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75kg person would gain if all atoms are replaced by atoms is:

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Out of the oxides given below which of them cannot be reduced by ?

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1) It exists as a diatomic molecule.
2) It has one electron in the outermost shell.
3) It can lose an electron to form a cation which can freely exist.
4) It cannot form ionic compounds.

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