X + d i l . H 2 S O 4 → Y colourless suffocating gas, Y + K 2 C r 2 O 7 + H 2 S O 4 → green colouration of solution. Then, X and Y are

Chemistry - Complete d-block Question with Solution | TestHub

ChemistryComplete d-blockd-blockEasy2 minPYQ_2020

ChemistryEasysingle choice

$[X] + d i l . H_{2} S O_{4} \to [Y]$ colourless suffocating gas, $[Y] + K_{2} C r_{2} O_{7} + H_{2} S O_{4} \to$ green colouration of solution. Then, $[X]$ and $[Y]$ are

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Solution:

$\underset{X}{S O_{3}^{2 -}} + d i l . H_{2} S O_{4} \to \underset{Y}{S O_{2}} + H_{2} O + S O_{4}^{2 -}$

Green colouration on reaction with $K_{2} C r_{2} O_{7}$ and $H_{2} S O_{4}$ shows that Y is $S O_{2}$ .

$K_{2} C r_{2} O_{7} + H_{2} S O_{4} + \underset{Y}{3 S O_{2}} \to \underset{(G r e e n colour)}{C r_{2} (S O_{4})_{3}} + K_{2} S O_{4} + H_{2} O$

Stream:NTA_ABHYASSubject:ChemistryTopic:Complete d-blockSubtopic:d-block

⏱ 2mℹ️ Source: PYQ_2020

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