Chemistry - Complete d-block Question with Solution | TestHub

ChemistryComplete d-blockd-blockEasy2 minPYQ_2020

ChemistryEasysingle choice

Pick out the incorrect statement

Options:

Answer:

Solution:

Decomposition of acidic $K M n O_{4}$ is catalysed by sunlight.

$4 M n O_{4}^{-} + 4 H^{+} \to 4 M n O_{2} + 3 O_{2} + 2 H_{2} O$

A. On dissolution, ${MnO}_{2}$ forms $M n^{2 +}$ ions and HCl is oxidized to $C l_{2}$ .

$M n O_{2} + 4 HC l^{-} \to M n^{2 +} + 2 C l^{-} + C l_{2} + H_{2} O$

B. $H_{2} S O_{4}$ is oxidized by $M n O_{2}$

$2 M n O_{2} + 2 H_{2} S O_{4} \to 2 M n S O_{4} + O_{2} + 2 H_{2} O$

C. $M n O_{2} + 2 K O H + \frac{1}{2} O_{2} \to \underset{G r e e n}{K_{2} M n O_{4}} + H_{2} O$

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

⏱ 2mℹ️ Source: PYQ_2020

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