Question

What change of colour is observed when H,S gas is passed
through an acidified aqueous solution of K2Cr2O7?​

Answer 1

Ans. Hydrogen sulphide is a reducing agent. When it is passed through an acidified solution of potassium dichromate, it reduces orange – coloured potassium dichromate to green – coloured chromium sulphide. Hence, the solution turns green.

Answer 2

Answer:

it reduces orange – coloured potassium dichromate to green – coloured chromium sulphide. Hence, the solution turns green.

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