JEE Main Chemistry question

The major product (70–80%) of the reaction between *m*-dinitrobenzene and ammonium polysulfide, (NH₄)₂Sₓ (the Zinin reduction), is

Answer: (B)

Solution

Ammonium polysulfide is a classical *selective, partial* reducing agent (the Zinin reduction): in a dinitroarene it reduces only one –NO₂ to

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Question ID VK-140382