NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice
When MnO 2 is fused with KOH and KNO 3 , a coloured compound is formed. Choose the right compound with the appropriate colour.
Options
- AK 2 MnO 4 , green
- BKMnO 4 , purple
- CMn 2 O 3 , brown
- DMn 3 O 4 , black
Correct answer
A. K 2 MnO 4 , green
Step-by-step solution
When MnO 2 reacts with fused mixture of KOH and KNO 3 , it forms K 2 MnO 4  (Green compound) as follows: MnO 2 + KNO 3 + 2   KOH → Δ K 2 MnO 4 green + KNO 2 + H 2 O