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When mixture of NaCl and K(2)Cr(2)O(7) i...

When mixture of NaCl and `K_(2)Cr_(2)O_(7)` is gently warmed with conc. `H_(2)SO_(4)` then compound X is formed. What is the oxidation state of central atom of X?

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The correct Answer is:
6
In this reaction, `CrO_(2)Cl_(2)` is formed in which Cr is +6.
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