AP EAMCET · Chemistry · Redox Reactions

Given below are two statements.
Statement I: In the decomposition of potassium chlorate, Cl is reduced.
Statement II: Reaction of Na with \(\mathrm{O}_2\) to form \(\mathrm{Na}_2 \mathrm{O}\) is a redox reaction.
The correct answer is

A Both statements-I and II are correct
B Both statements-I and II are not correct
C Statement-I is correct but statement-II is not correct
D Statement-I is not correct but statement-II is correct

Verified Solution

Answer & Solution

Correct Answer

(A) Both statements-I and II are correct

Step-by-step Solution

Detailed explanation

Decomposition of potassium chlorate can be represented as: \(\stackrel{+1~+5~-2}{2 \mathrm{KClO}}_{3(s)} \xrightarrow{\Delta} 2 \stackrel{+1~-1}{\mathrm{KCl}}_{(s)}+3 \stackrel{0}{\mathrm{O}}_{2(\mathrm{g})}\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Given below are two statements.Statement I: In the decomposition of potassium chlorate, Cl is reduced.Statement II: Reaction of Na with \(\mathrm{O}_2\) to form \(\mathrm{Na}_2 \mathrm{O}\) is a redox reaction.The correct answer is

Step-by-step Solution

Given below are two statements.
Statement I: In the decomposition of potassium chlorate, Cl is reduced.
Statement II: Reaction of Na with \(\mathrm{O}_2\) to form \(\mathrm{Na}_2 \mathrm{O}\) is a redox reaction.
The correct answer is