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JEE Main levelSingle correct optionDifficulty 2 of 3bn196

Hydrazoic acid is $HN X_{3}$ . What is the average oxidation number of N, with H = +1?

A $- 1$
B $+ 1/3$
C $- 1/3$
D $- 3$

Answer: C

+ 1 + 3 x = 0

gives

x = - 1/3

(average over the three N atoms).

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