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Chemistry
Ammonium dichromate is used in some fireworks. The green coloured powder blown in the air is
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Q. Ammonium dichromate is used in some fireworks. The green coloured powder blown in the air is
IIT JEE
IIT JEE 1997
The d-and f-Block Elements
A
$CrO_3$
B
$Cr_2O_3$
C
$Cr$
D
$CO$
Solution:
Ammonium dichromate $[(NH_4)_2Cr_2O_7$ ]on heating decomposes producing green powder of $Cr_2O_3$ and $N_2(g)$ is evolved