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  4. HCl cannot form H2Cl2, while HF can form H2F2. The reason is

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Q. $HCl$ cannot form $H_2Cl_2$, while $HF$ can form $H_2F_2$. The reason is

The p-Block Elements - Part2

Solution:

More electronegative atom such as $N, O$ and $F$ form hydrogen bonding thus. $HCl$ can’t form but $HF$ can form hydrogen bonding.