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Q.

The correct set of quantum numbers for the unpaired electron of chlorine atom is

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a

n l m

2 1 1

b

n l m

3 0 0

c

n l m

2 1 0

d

n l m

3 1 0

answer is C.

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Detailed Solution

Electronic configurtionof Chlorine is 

Cl = 1s2 2s2 2p6 3s2 3p5.

n=3 

l= 1 

m= -1 , 0 , +1

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