NEET Chemistry Redox Reactions Questions Solved

If H2S is passed through an acidified K2Cr2O7 solution, the colour of the solution:

(a) will remain unchanged

(b) will change to deep red

(c) will change to dark green

(d) will change to dark brown 

(c) Cr3+ ion is green; Cr26+ + 6e 2Cr3+

Difficulty Level:

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