1.

The number of unpaired electrons in \[1{{s}^{2}},\,2{{s}^{2}}2{{p}^{4}}\] is [NCERT 1984; CPMT 1991; MP PMT 1996, 2002]

A.                 4
B.                 2
C.                 0             
D.                 1
Answer» C.                 0             


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