Which of the following compound is formed when $C O_{2}$ gas is passed through an aqueous solution of sodium chromate?

C r {(O H)}_{3}

is precipitated

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Yellow solution of

C r_{2} {(C O_{3})}_{2}

is formed

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Yellow solution of

N a_{2} C r_{2} O_{7}

is formed

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Solution

The correct option is B Yellow solution of $N a_{2} C r_{2} O_{7}$ is formed
Yellow solution of $N a_{2} C r_{2} O_{7}$ is formed,when $C O_{2}$ gas is passed through an aqueous solution of sodium chromate.

$2 N a_{2} C r O_{4} + 2 C O_{2} ⟶ N a_{2} C r_{2} O_{7} + 2 N a H C O_{3}$

So, the correct option is $C$

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