Chemistry - Complete d-block Question with Solution | TestHub

ChemistryComplete d-blockd-blockMedium2 minQB

ChemistryMediumsingle choice

In which reaction reddish brown vapour is evolved?

Answer:

Solution:

Reddish-brown vapor is due to the formation of NO₂ gas.

K₂Cr₂O₇ + conc. H₂SO₄ + Cl⁻ $Δ$ produces Cl₂ (greenish-yellow gas), not reddish-brown.

In the reaction of MnO₂ with HCl, chlorine gas is evolved:

$Mn O_{2} + 4HCl \to MnC l_{2} + C l_{2} + 2 H_{2} O$

Therefore, the reaction giving colored vapor is option (C).

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

⏱ 2mℹ️ Source: QB

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