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Question

Chemistry Question on p -Block Elements

Which among the following is paramagnetic?

A

Cl2O

B

ClO2

C

Cl2O7

D

Cl2O6

Answer

ClO2

Explanation

Solution

A species with one or more unpaired electronsis paramagnetic.
No. of valence electrons in Cl2O = 7 x 2 + 6 = 20 (even)
No. of valence electrons in ClO2 = 7 + 6 x 2 = 19 (odd)
No. of valence electrons in Cl2O7 = 7 x 2 + 6 x 7 = 56 (even)
No. of valence electrons in Cl2O6 = 7 x 2 + 6 x 6 = 50 (even)
Thus, ClO2 is expected to be paramagnetic.