d-Block Elements - Compounds (KMnO4, K2Cr2O7)

Grade 12 Chemistry — d-Block Elements - Compounds (KMnO4, K2Cr2O7): 25 practice questions with instant scoring and explanations.

1. In KMnO₄, Mn has oxidation state of:
2. KMnO₄ is a:
3. In neutral solution, MnO₄⁻ is reduced to:
4. In acidic solution, MnO₄⁻ is reduced to:
5. In basic solution, MnO₄⁻ is reduced to:
6. KMnO₄ oxidizes aldehydes to:
7. The reduction of KMnO₄ in KMnO₄/KOH is:
8. In K₂Cr₂O₇, Cr has oxidation state of:
9. K₂Cr₂O₇ in acidic medium is reduced to:
10. K₂Cr₂O₇ in neutral/basic solution is reduced to:
11. The color of K₂Cr₂O₇ is:
12. The color of Cr³⁺ solution is:
13. K₂Cr₂O₇ oxidizes primary alcohols to:
14. K₂Cr₂O₇ oxidizes secondary alcohols to:
15. K₂Cr₂O₇ does NOT oxidize:
16. In the oxidation of oxalic acid by KMnO₄, MnO₄⁻ acts as:
17. The oxidation of oxalic acid is:
18. KMnO₄ bleaching is due to:
19. The half-reaction for MnO₄⁻ → Mn²⁺ in acidic solution is:
20. The half-reaction for Cr₂O₇²⁻ → Cr³⁺ in acidic solution is:
21. The number of electrons transferred in the oxidation of one mole of oxalic acid by permanganate is:
22. Potassium permanganate is used for:
23. The stability of Cr(VI) is:
24. CrO₃ is an anhydride of:
25. Dichromate is formed from chromate by: