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Question

Which of the following exhibit the weakest intermolecular forces?


A

He

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B

HCl

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C

NH3

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D

H2O

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Solution

The correct option is A

He


Generally, zero group elements (noble gases) are linked by weak Van der Waal's forces of attraction. Hence these show the weakest intermolecular forces.
Also, note that all other molecules are polar in nature hence the intermolecular forces between them are comparatively strong.


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