1.

Which of the following are iso-electronic               [CBSE 2002]

A.                 \[C{{O}_{2}}\] and \[NO\]           
B.                 \[S{{O}_{2}}\] and\[C{{O}_{2}}\]
C.                 \[CN\] and \[CO\]           
D.                 \[N{{O}_{2}}\] and \[C{{O}_{2}}\]
Answer» D.                 \[N{{O}_{2}}\] and \[C{{O}_{2}}\]


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