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Question

KCl+concH2SO4+K2Cr2O7Δ(X)NaOH−−−−(Y)KCl+concH2SO4+K2Cr2O7Δ(X)NaOH−−−−(Y). (X) is reddish brown coloured gas soluble in forming (Y). (X) and (Y) are___________.

A
Cr2OCl2,Na2CrO3
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B
Cr2O2Cl2,Na2CrO3
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C
CrO2Cl,Na2CrO4
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D
CrO2Cl2,Na2CrO4
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Solution

The correct option is D CrO2Cl2,Na2CrO4
4KCl+3H2SO4+K2Cr2O7Δ2CrO2Cl2yellow,chromylchloride,(X)+3K2SO4+3H2OCrO2Cl2+4NaOH

Na2CrO4Yellowsodiumchromate,(Y)+2NaCl+2H2O
Thus, (X) is CrO2Cl2 and (Y) is Na2CrO4

So, the correct option is D

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