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GATE 2026 Chemical Engineering, Q19 · Reaction Engineering

The correct answer is C, Recycle increases the overall conversion..

Question

For an irreversible reaction containing inerts in the feed, single-pass conversion in a reactor is 70%. Which one of the following statements is CORRECT?

  • A. Recycle eliminates the need for a purge stream.
  • B. Recycle reduces the concentration of inerts in the system.
  • C. Recycle increases the overall conversion.
  • D. Recycle decreases the overall conversion.

Official answer: Recycle increases the overall conversion.

Why

GATE 2026 official key: (C). Recycling unreacted feed lets it react further on later passes, raising overall conversion above the single-pass value (a purge is still needed to bleed off inerts).

Explanation cross-checked for consistency. Final answer matches the official IIT answer key.

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