Assertion :Solution of Na2CrO4 in water is intensely coloured. Reason: Oxidation state of Cr in Na2CrO4 is +VI.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion In Na2CrO4 or CrO2−4 ion, Cr is in +6 oxidation state and has d0 configuration. The colour is due to charge transfer and not due to d - d transition as there is no d electrons.