Question

Acidified potassium dichromate is treated with hydrogen sulfide. In the reaction, the oxidation number of chromium:

• A. Increases from +3 to +6
• B. Decreases from +6 to +3
• C. Remains unchanged
• D. Decreases from +6 to +2

Hint:

In redox reactions, the oxidation state of an element changes as it gains or loses electrons.

Answer 1

The Correct Option is B

In the reaction between potassium dichromate and hydrogen sulfide, the chromium in the dichromate is reduced from an oxidation state of +6 to +3.
Final Answer: \[ \boxed{\text{Decreases from +6 to +3}} \]