A) \[HF>HI>HBr>HCl\]
B) \[HF>HBr>HI>HCl\]
C) \[HCl>HBr>HI>HF\]
D) \[HCl>HI>HBr>HF\]
Correct Answer: A
Solution :
Key Idea: (i) HF has abnormally high boiling point due to intermolecular hydrogen bonding. (ii) Among \[HCl,\,\,HBr\], and HI boiling point decreases as follows \[HI>HBr>HCl\] Due to increase in size which results in increase in van der Waals forces of attraction: Compound HF \[HCl\] HBr HI B.P. (K) 293 189 206 238 \[\therefore \] The correct order is \[HF>HI>HBr>HCl\]
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