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ChemistryJEE Main 22 Jan 2026, Shift 1·Q12·MCQ·Easy

Chemical Kinetics · First order rate and concentration

A→products\ce{A -> products} (First order reaction).

Three sets of experiment were performed for a reaction under similar experimental conditions.

Run 1 ⇒\Rightarrow 100 mL of 10 M solution of reactant A

Run 2 ⇒\Rightarrow 200 mL of 10 M solution of reactant A

Run 3 ⇒\Rightarrow 100 mL of 10 M solution of reactant A + 100 mL of HX2O\ce{H2O} added.

The correct variation of rate of reaction is

  1. (1)Run 1 = Run 2 = Run 3
  2. (2)Run 3 << Run 1 = Run 2
  3. (3)Run 3 << Run 1 << Run 2
  4. (4)Run 1 << Run 2 << Run 3

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See the full 22 Jan 2026, Shift 1 paper