In the chromyl chloride test, the reagent used is

K_{2} C r O_{4}

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C r O_{3}

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K_{2} C r_{2} O_{7}

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

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Solution

The correct option is C
$K_{2} C r_{2} O_{7}$
Chromyl chloride test is used to test for chloride ions.
$4 N a C l + K_{2} C r_{2} O_{7} + 6 H_{2} S O_{4} \to 2 K H S O_{4} + 2 C r O_{2} C l_{2} C h r o m y l c h l o r i d e + 4 N a H S O_{4} + 3 H_{2} O$

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