Assertion :To a solution of potassium chromate if a strong acid is added it changes its colour from yellow to orange. Reason: The colour change is due to the oxidation of potassium chromate.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
In presence of acid, chromate changes into dichromate nad colour changes accordingly.
Reaction:
$+ 6 2 C r O_{4}^{2 -} (y e l l o w) + 2 H^{+} \to + 6 C r_{2} O_{7}^{2 -} (o r a n g e) + H_{2} O$
There is no change in oxidation state of Cr.

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Q. Assertion :To a solution of potassium chromate, if a strong acid is added, it changes its color from yellow to orange. Reason: The color change is due to the change in oxidation state of potassium chromate.

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Assertion :To a solution of potassium chromate if a strong acid is added it changes its colour from yellow to orange. Reason: The colour change is due to the oxidation of potassium chromate.

The correct option is C Assertion is correct but Reason is incorrectIn presence of acid, chromate changes into dichromate nad colour changes accordingly.Reaction: +62CrO2−4(yellow)+2H+→+6Cr2O2−7(orange)+H2OThere is no change in oxidation state of Cr.