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Question

Distinguish clearly between salt-like and covalent hydrides.

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Solution

  • Salt-like hydrides are also called ionic hydrides. They are formed by group 1 and 2 elements with H2. They are basic in nature. They dissolve in water forming alkali and give H2 gas, .e.g., NaH,CaH2,KH, etc.
  • Covalent hydrides are formed between less electropositive or electronegative elements. Ex:B2H6,AlH3,BeH2, They are insoluble in water.

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