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Question

In which of the following sets the order of boiling points are incorrect?

A
Xe>Ar>Ne
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B
HF>HCl>HBr
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C
H2O>H2Se>H2S
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D
C3H6>C2H5>CH4
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Solution

The correct option is B HF>HCl>HBr
The correct order of boiling point of hydrogen halides is HBr>HCl>HF because as the molar mass of halogen increases the boiling point increases.

Hence, option B is correct.

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