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Q.

Statement 1 : To a solution of potassium chromate if a strong acid is added it changes its colour from yellow to orange.
Statement 2 : The colour change is due to the oxidation of potassium chromate.

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a

Statement 1 is true, statement 2 is true ; statement 2 is a correct explanation for statement 1

b

Statement 1 is true, statement 2 is true ; statement 2 is not a correct explanation for statement 1

c

Statement 1 is false, statement 2 is true

d

Statement 1 is true, statement 2 is false

answer is C.

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Detailed Solution

$\underset{(yellow)}{\overset{+ 6}{2 {CrO}_{4}^{2 -}}} + 2 H^{+} ⟶ \underset{(orange)}{\overset{+ 6}{{Cr}_{2}}} {O_{7}}^{2 -} + H_{2} O$

There is no change in oxidation state. So the explanation is wrong.

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