KVPY SX SB Exam 2018 Question Paper

Question : 104 of 120

Marks: +1, -0

The heating of

(NH_4)_2Cr_2O_7

produces another chromium compound along with

N_2

gas. The change of the oxidation state of Cr in the reaction is .

Solution:

(NH_4)_2 \ {Cr_2O_7} → N_2 + Cr_2O_3

+ 4H_2O

\;\;\;\;\;\;\;\;\;\;+6\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;+3

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