Question

# The correct order of thermal stability of hydrogen halides (H-X) is :

A
HI>HBr>HCl>HF
B
HF>HCl>HBr>HI
C
HCl>HF>HBr>HI
D
HI>HCl>HF>HBr

Solution

## The correct option is C $$HF > HCl > HBr > HI$$As we move down the group in hydrogen halides the thermal stability decreases  due to decrease in bond strength.So the correct order of thermal stability is $$HF > HCl > HBr > HI$$Hence ,option B is correct.Chemistry

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