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For A_2+ B_2 ⇌ 2 AB E_ a for forward and backward reaction are 180 and 200 ~kJ ~mol^-1 respectively If catalyst lowers E_ a for both reaction by 100…

JEE Main 2025 — Chemistry Physical Chemistry

2025mcqmedium

For A2+B2⇌2AB\mathrm{A}_2+\mathrm{B}_2 \rightleftharpoons 2 \mathrm{AB}A2​+B2​⇌2AB

Ea\mathrm{E}_{\mathrm{a}}Ea​ for forward and backward reaction are 180 and 200 kJ mol−1200 \mathrm{~kJ} \mathrm{~mol}^{-1}200 kJ mol−1 respectively

If catalyst lowers Ea\mathrm{E}_{\mathrm{a}}Ea​ for both reaction by 100 kJ mol−1100 \mathrm{~kJ} \mathrm{~mol}^{-1}100 kJ mol−1.

Which of the following statement is correct?

Official previous-year question

Held on 4 Apr 2025 · Verified 6 Jul 2026.

Options

  1. A

    Catalyst does not alter the Gibbs energy change of a reaction.

  2. B

    Catalyst can cause non-spontaneous reactions to occur.

  3. C

    The enthalpy change for the reaction is +20 kJ mol−1+20 \mathrm{~kJ} \mathrm{~mol}^{-1}+20 kJ mol−1.

  4. D

    The enthalpy change for the catalysed reaction is different from that of uncatalysed reaction.

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