Question

A reaction gas mixture contains 50%, 30%, 20% of A, B and C by volume respectively. The mixture undergoes the following reactions: \[ \text{(i) } A + 2B \rightarrow P_1 \\ \text{(ii) } 2P_1 + 3C \rightarrow P_2 \] Choose the correct answer if the reaction completes.

• A. C will be completely exhausted.
• B. A will be completely exhausted.
• C. B will be completely exhausted.
• D. \( P_2 \) will be completely exhausted.

Hint:

Always analyze limiting reagents step-by-step for multi-step reactions.
Track intermediate product consumption as well.

Answer 1

The Correct Option is D

From first reaction: \( A + 2B \rightarrow P_1 \), limiting reagent is B. From second: \( 2P_1 + 3C \rightarrow P_2 \), C is the limiting reagent. Since all of \( P_1 \) reacts completely with C to give \( P_2 \), and since C gets fully used up, \( P_2 \) gets completely consumed too.