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The hydrides of the first elements in gr...

The hydrides of the first elements in group 15-17, namely `NH_(3),H_(2)O and HF` respectively show abnormally high values for melting and boililng points. This is due to-

A

small size of N, O and F

B

the ability to form extensive intermolecular H-bonding

C

the ability to form extensive intramolecular H-bonding

D

effective van der waals interactions.

Text Solution

Verified by Experts

The correct Answer is:
B
The ionisation potential valeus of N, O and F are quite high and thus, they form intermolecular H-bonding to the compound `NH_(3),H_(2)O and HF`. As a result, these compounds show abnormally high values for melting and boiling points.
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CHHAYA PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-ENTRANCE QUESTION BANK
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  15. Which of the following atoms ha the highest first ionisation energy-

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