1.

Which of the following is the green coloured powder produced when ammonium dichromate is used in fire works

Answer»

`Cr`
`CrO_(3)`
`Cr_(2)O_(3)`
`CrO(O_(2))`

Solution :`(NH_(4))_(2)Cr_(2)O_(7)overset(Delta)rarrN_(2)+Cr_(2)O_(3)+4H_(2)O`


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