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Explain how hydrogen differs from alkali...

Explain how hydrogen differs from alkali metals on the basis of ionisation energies.

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Ionisation energy of hydrogen is very high in comparison to that of alkali metals, for example,ionisation energy of H is 1312 Kj/mol wheras that of Li is 520 kJ/mol.
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  10. Name the groups whose elements prefer to form molecular hydrides.

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  16. How many hydrogen bonded water molecules are associated with CuSO(4). ...

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  18. Water acts as a/an when it reacts with ammonia.

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  19. Cation exchange resins are generated by treating with.

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  20. Why temporary hardness of water is called so?

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