NCERT Class XII Chemistry <br> Chapter - The p-Block Elements <br> Questions with Solutions

NCERT Class XII Chemistry
Chapter - The p-Block Elements
Questions with Solutions

Question : 25

Total: 74

Explain why inspite of nearly the same electronegativity, oxygen forms hydrogen bonding while chlorine does not.

Solution:

Although O and Cl have about the same electronegativity, yet theiratomic size (covalent radii) are much different : O = 66 pm and Cl = 99 pm.Thus, electron density per unit volume of oxygen atom is much higherthan that of chlorine atom. Hence, oxygen forms hydrogen bonds whilechlorine does not though both have approx. the same electronegativity.

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NCERT Class XII Chemistry Chapter - The p-Block Elements Questions with Solutions

NCERT Class XII Chemistry
Chapter - The p-Block Elements
Questions with Solutions