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Question

Which one of the following pairs is obtained on heating ammonium dichromate?

A
N2 and H2O
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B
H2O and H2O
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C
NO2 and H2O
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D
NO and NO2
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Solution

The correct option is A N2 and H2O
On heating ammonium dichromate; N2,H2O and Cr2O3 are formed.
(NH4)2Cr2O7(s)N2(g)+4H2O(g)+Cr2O3(s)ΔH=429kcal/mol

Option (A) is correct.

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