Question

The product A in the reaction: 2KMnO4 → A + MnO2 +O2, is:
(A) K2Mn207
(B) K2MnO4
(C) K20
(D) K202
A black sulphide when treated with ozone becomes white. The white compound is:
(A) ZnSO4
(B) CaSO4
(C) BaSO4
(D) PbSO4
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Answer 1

Answer:

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