Q.

Which of the following is most volatile

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a

HI

b

HCl

c

HBr

d

HF.

answer is C.

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Detailed Solution

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  • Boiling point of HF is highest due to H-bonding.
  • For other halogen acids boiling point increase in the order HCl<HBr<HI. Therefore, most volatile (with lowest boiling point) is HCl.
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