# NEET Chemistry Redox Reactions Questions Solved

One mole of N2H4 loses 10 mole of electrons to form a new compound Y. Assuming that all nitrogen appear in the new compound, what is the oxidation state of N2 in Y ? (There is no change in the oxidation state of hydrogen) [IIT 1981; Pb. PMT 1998]

(1) + 3

(2) – 3

(3) – 1

(4) + 5

(1) ${N}_{2}^{2-}\to {\text{\hspace{0.17em}}}_{2}{N}^{a+}+10{e}^{-}$

$2a-\left[2×\left(-2\right)\right]=10$

$a=+3$

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