A certain reaction occurs in two steps as: (i) 2SO2g+2NO2g→2SO3g+2NOg (ii) 2NOg+O2g→2NO2g In the reaction,

MHT CET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

A certain reaction occurs in two steps as:
(i) $2 S O_{2} (g) + 2 N O_{2} (g) \to 2 S O_{3} (g) + 2 N O_{(g)}$
(ii) $2 N O_{} (g) + O_{2} (g) \to 2 N O_{2} (g)$
In the reaction,

A $N O_{2} (g)$ is intermediate
B $N O_{} (g)$ is intermediate
C $N O_{} (g)$ is catalyst
D $O_{2} (g)$ is intermediate

Verified Solution

Answer & Solution

Correct Answer

(B) $N O_{} (g)$ is intermediate

Step-by-step Solution

Detailed explanation

On adding equation (1) & (2) we get

2 S O_{2} + 2 N O_{2} + O_{2} \to 2 S O_{3} + 2 N O_{2}

The

N O

is not considered.
It is a intermediate in the reaction.

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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A certain reaction occurs in two steps as:(i) 2SO2g+2NO2g→2SO3g+2NOg(ii) 2NOg+O2g→2NO2gIn the reaction,

Step-by-step Solution

A certain reaction occurs in two steps as:
(i) $2 S O_{2} (g) + 2 N O_{2} (g) \to 2 S O_{3} (g) + 2 N O_{(g)}$
(ii) $2 N O_{} (g) + O_{2} (g) \to 2 N O_{2} (g)$
In the reaction,