1.

Among the hydrides formed by the group VI-A elements, only H_2 O has an abnormally low volatility (high boiling point). This is so because

Answer»

`H_(2)O` molecules are associated due to intermolecular HYDROGEN bond
`H_(2)O` is COVALENT in nature
The O-H bond in `H_(2)O` is very strong
The electronegativity difference of H and O is very LARGE

Answer :A


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