A mixture of Na2CO3 and Na2SO3 is treated with dilute H2SO4 in a setup such that the gaseous mixture emerging can pass first through a solution of BaCl2 and then gases mixture passed through acidified

Question

A mixture of Na2CO3 and Na2SO3 is treated with dilute H2SO4 in a setup such that the gaseous mixture emerging can pass first through a solution of BaCl2 and then gases mixture passed through acidified K2Cr2O7. Which of the following will you observe?

Prashant Kotian · Accepted Answer

Correct answer: B. Step 1: Chromium(VI) is a strong oxidizing agent, and bromide ion (Br-) is a moderate reducing agent. Step 2: Chromyl chloride (CrO2Cl2) is stable and well-known. However, the analogous chromyl bromide (CrO2Br2) is highly unstable because of the ready oxidation of bromide by Cr(VI) to form bromine gas (Br2) and Cr(III). Step 3: Therefore, chromyl bromide (CrO2Br2) does not exist under ordinary conditions, making option (a) the correct choice.

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