JEE Main · 2021 · Shift-IhardCK-028

For the following graphs: Choose from the options given below, the correct one regarding order of reaction is:

Chemical Kinetics · Class 12 · JEE Main Previous Year Question

Question

For the following graphs: image Choose from the options given below, the correct one regarding order of reaction is:

Options
  1. a

    (b) zero order; (c) and (e) First order

  2. b

    (a) and (b) Zero order; (e) First order

  3. c

    (b) and (d) Zero order; (e) First order

  4. d

    (a) and (b) Zero order; (c) and (e) First order

Correct Answerb

(a) and (b) Zero order; (e) First order

Detailed Solution

Identifying orders from graphs:

  • Zero order: [A][\mathrm{A}] vs tt is a straight line with negative slope → graphs (a) and (b)
  • First order: ln[A]\ln[\mathrm{A}] vs tt is a straight line with negative slope → graphs (c) and (e)
  • Second order: 1/[A]1/[\mathrm{A}] vs tt is a straight line with positive slope

Answer: Option (2)

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