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NEET levelSingle correct optionDifficulty 1 of 3bn169

Which is the correct formula of ammonium dichromate?

A $NH X_{4} Cr X_{2} O X_{7}$
B $(NH X_{4}) X_{2} Cr X_{2} O X_{7}$
C $(NH X_{4}) X_{2} Cr X_{2} O X_{4}$
D $(NH X_{4}) X_{2} CrO X_{4}$

Answer: B

Ammonium is

NH X_{4} X^{+}

and dichromate is

Cr X_{2} O X_{7} X^{2 -}

. Two

NH X_{4} X^{+}

balance one dichromate:

(NH X_{4}) X_{2} Cr X_{2} O X_{7}

.

(NH X_{4}) X_{2} CrO X_{4}

is ammonium chromate.

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