1.

The number of electrons to balance the following equation \[NO_{3}^{-}+4{{H}^{+}}+{{e}^{-}}\,\to \,2{{H}_{2}}O+NO\] is    [IIT Screening 1991]

A.                 5             
B.                 4
C.                 3             
D.                 2
Answer» D.                 2


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