JEE Main 2026 Chemistry question

Which of the following sets includes all the species that will change the orange colour of K₂Cr₂O₇ in acidic medium?

Answer: (A)

Solution

Only reducing agents that can be oxidised will reduce orange Cr₂O₇²⁻ to green Cr³⁺. Fe²⁺, Sn²⁺, I⁻ and S²⁻ are all reducing

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Question ID VK-015245