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NEET levelSingle correct optionDifficulty 1 of 3bn096

What is the formula of ammonium dichromate ( $NH X_{4} X^{+}$ , $Cr X_{2} O X_{7} X^{2 -}$ )?

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

Answer: D

Dichromate is

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

, so two

NH X_{4} X^{+}

are needed to balance

- 2

:

(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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