Question
Which of the following statements is true about hydrogen bonding?
A.
$$Cl$$ and $$N$$ have comparable electronegativities yet there is no $$H$$ - bonding in $$HCl$$ because size of $$Cl$$ is large.
B.
Intermolecular $$H$$ - bonding results in decrease in $$m.pt.$$ and $$b.pt.$$
C.
Ice has maximum density at $${0^ \circ }C$$ due to $$H$$ - bonding.
D.
$$KHC{l_2}\left( {HCl_2^ - } \right)$$ exists but $$KH{F_2}\left( {HF_2^ - } \right)$$ does not exist due to lack of $$H$$ - bonding in $$HCl.$$
Answer :
$$Cl$$ and $$N$$ have comparable electronegativities yet there is no $$H$$ - bonding in $$HCl$$ because size of $$Cl$$ is large.
Solution :
For hydrogen bonding, the size of the atom should be small.