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Q. The incorrect order is

NTA AbhyasNTA Abhyas 2020The p-Block Elements - Part2

Solution:

Here order given in option C is incorrect as the correct order boiling point is as follows

$\underset{H - bonding}{\underbrace{H F}} > \underset{attraction \left(\right. V . W . forces \left.\right)}{\underset{Dipole - dipole}{\underbrace{H I > H B r > H C l}}}$

Rest other orders given here are correct as per as their properties.