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Friday, 9 October

JEE Main 2026 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 2 April 2026, Shift 2, Chemistry Q57

Question 57 of 75 in this shift, Chemistry question 7 of 25, Section A.

Consider the reaction aX→bYaX \to bY, for which the rate constant at 30°C is 1×10−31 \times 10^{-3} mol−1^{-1}Ls−1s^{-1}. Which of the following statements are true? A. When concentration of 'X' is increased to four times, the rate of reaction becomes 16 times. B. The reaction is a second order reaction. C. The half-life period is independent of the concentration of X. D. Decomposition of N2_2O5_5 is an example of the above reaction. E. In[[R0][R]]\text{In}\left[\frac{[R_0]}{[R]}\right] vs time graph is valid for the above reaction. Choose the correct answer from the options given below:
  1. (1)A and B OnlyOfficial answer
  2. (2)A, B and C Only
  3. (3)A, B, D and E Only
  4. (4)C and D Only

Official answer

Option 1

NTA final key.

Chapter
Chemical Kinetics
Topic
Rate Laws
Idea tested
Rate Constant Units

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.