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  4. When (NH4)2Cr2O7 is heated, the gas evolved is

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Q. When $(NH_4)_2Cr_2O_7 $ is heated, the gas evolved is

AIPMTAIPMT 1994The d-and f-Block Elements

Solution:

When ammonium dichromate is heated, it form nitrogen gas, $Cr_2O_3 $ and water.
$(NH_4)_2Cr_2O_7 \xrightarrow{\Delta}Cr_2O_3+4H_2O+N_2 $