1.

Chemical volcanois producedon heating

Answer»

`K_(2)Cr_(2)O_(7)`
`(NH_(4))_(2)Cr_(2)O_(7)`
`ZnCr_(2)O_(7)`
`K_(2)CrO_(4)`

Solution :Onheating `(NH_(4))_(2)Cr_(2)O_(7),N_(2)` is gives outwith `Cr_(2)O_(3)` POWDER athigher RATE givingalook of artificialvolcano.


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