The compound with the lowest boiling point among the following is:

HCl

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HBr

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Solution

The correct option is A
HCl

Boiling point of covalent compounds(HF,HCl,HBr,HI) increases with increase in their molecular weight due to increase in van der Waal’s forces of attraction among molecules.

HF shows H-bonding possess higher boiling point or less volatile nature.

HCl< HBr<HI<HF

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