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How many gases are evolved when potassiu...

How many gases are evolved when potassium permaganate and potassium dichromate are heated, respectively?

A

Barium

B

Strontim

C

Calcium

D

Radium

Text Solution

Verified by Experts

The correct Answer is:
C
`2KMnO_4 overset("heat")to K_2MnO_4 (s) + MnO_2(s) + O_2(g)`
`K_2Cr_2O_7 overset("heat")to 4K_2 CrO_4(s) + 2Cr_2O3 (s) + 3O_2 (g)`
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