How many of the following will give `O_(2)` on heating ? `K
Channel: Doubtnut
Date: 16/02/2020

How many of the following will give `O_(2)` on heating ? `KMnO_(4),K_(2)Cr_(2)O_(7),ZnO,Na_(2)O,` `PbO_(2),Pb_(3)O_(4),Pb(NO_(3))_(2),NH_(4)NO_(3)`