Redox Reactions And Electrochemistry Ques 108

Question: One mole of $ N_2H_4 $ loses 10 mol of electrons to form a new compound Y. Assuming that all nitrogen appear in the new compound, what is the oxidation state of $ N_2 $ in Y - (There is no change in the oxidation state of hydrogen) [IIT 1981; Pb. PMT 1998]

Options:

A) + 3

B) - 3

C) - 1

D) + 5

Show Answer

Answer:

Correct Answer: A

Solution:

$ N_2^{2-}\to _2{{N}^{a+}}+10{{e}^{-}} $ \ $ 2a-[2\times (-2)]=10 $ \ $ a=+3 $ .



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