Q.

(A): Chromates and Dichromates are not interconvertible in aqueous solution with change in pH

(R): Chromates are orange in colour.

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a

Both (A) and (R) are false

b

(A) is true but (R) is false

c

Both (A) and (R) are true and (R) is not the correct explanation of (A)

d

Both (A) and (R)  are true and  (R) is the correct explanation of (A)

answer is D.

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Detailed Solution

In acidic medium chromate ion converts to dichromate ion as :

2CrO42-yellow+2H+Cr2O72-orange+H2O

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