Identify D and E in the following :

D : (N H_{4})_{2} C r_{2} O_{7} E : C r_{2} O_{3}

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D : (N H_{4})_{2} C r_{2} O_{7} E : C r_{2} O_{2}

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D : (N H_{4}) C r_{2} O_{7} E : C r_{2} O_{3}

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D : (N H_{4}) C r_{2} O_{7} E : C r_{2} O_{2}

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Solution

The correct option is A $D : (N H_{4})_{2} C r_{2} O_{7} E : C r_{2} O_{3}$
(D) is ammonium dichromate $(N H_{4})_{2} C r_{2} O_{7}$ and (E) is $C r_{2} O_{3}$ .

When ammonium dichromate is heated, chromic oxide is obtained.

$(N H_{4})_{2} C r_{2} O_{7} h e a t - - \to N_{2} + C r_{2} O_{3} + 4 H_{2} O$

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