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Previous year question hub

Reaction Kinetics - Life Sciences Previous Year Questions

Practice Reaction Kinetics - Life Sciences previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

17Papers
17Years
23Questions
1Topics

Reaction Kinetics question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Reaction Kinetics. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 14 60.9%
Medium 9 39.1%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 14 60.9%
Numerical Answer Type (NAT) 8 34.8%
Fill in the blanks 1 4.3%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
23 Qs

Most asked topics

Top topics across the included previous year papers.

Reaction Kinetics
23 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Reaction Rates and Rate Laws
22 Qs
Catalysis and Enzyme Inhibition
1 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Life Sciences (XL) 2026
1 Qs
Life Sciences (XL) 2025
2 Qs
Life Sciences (XL) 2024
1 Qs
Life Sciences (XL) 2023
1 Qs
Life Sciences (XL) 2022
1 Qs
Life Sciences (XL) 2021
2 Qs
Life Sciences (XL) 2020
2 Qs
Life Sciences (XL) 2019
1 Qs
Life Sciences (XL) 2018
1 Qs
Life Sciences (XL) 2017
1 Qs
Life Sciences (XL) 2016
1 Qs
Life Sciences (XL) 2014
1 Qs
Life Sciences (XL) 2013
2 Qs
Life Sciences (XL) 2011
1 Qs
Life Sciences (XL) 2010
1 Qs
Life Sciences (XL) 2009
1 Qs
Life Sciences (XL) 2008
3 Qs

Browse by subtopics

Open a focused page built from the same verified paper data.

Reaction Rates and Rate Laws

Explore previous-paper coverage, trends and focused practice for Reaction Rates and Rate Laws.

22 questions16 papers16 years

Catalysis and Enzyme Inhibition

Explore previous-paper coverage, trends and focused practice for Catalysis and Enzyme Inhibition.

1 questions1 papers1 years

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
Life Sciences (XL) 202620261View paper
Life Sciences (XL) 202520252View paper
Life Sciences (XL) 202420241View paper
Life Sciences (XL) 202320231View paper
Life Sciences (XL) 202220221View paper
Life Sciences (XL) 202120212View paper
Life Sciences (XL) 202020202View paper
Life Sciences (XL) 201920191View paper
Life Sciences (XL) 201820181View paper
Life Sciences (XL) 201720171View paper
Life Sciences (XL) 201620161View paper
Life Sciences (XL) 201420141View paper
Life Sciences (XL) 201320132View paper
Life Sciences (XL) 201120111View paper
Life Sciences (XL) 201020101View paper
Life Sciences (XL) 200920091View paper
Life Sciences (XL) 200820083View paper

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

1
2008 · Life Sciences · Reaction Kinetics · Reaction Rates and Rate Laws
Life Sciences (XL) 2008
The plot of concentration of A against time is a straight line with negative slope for the reaction:
\[A \rightarrow \text{products}\]
The order of the reaction is
Open complete paper
2
2009 · Life Sciences · Reaction Kinetics · Reaction Rates and Rate Laws
Life Sciences (XL) 2009
For a second order reaction, \( R \xrightarrow{k} P \), the relation between half-life time ( \( t_{1/2} \) ) and the initial reactant concentration [\( R_0 \)] is
Open complete paper
3
2010 · Life Sciences · Reaction Kinetics · Catalysis and Enzyme Inhibition
Life Sciences (XL) 2010
For a particular reaction, the use of a catalyst reduces the activation energy (Eₐ) to one-third its original value. The ratio of rate constants (kcatalyzed / kuncatalyzed) is
Open complete paper
4
2011 · Life Sciences · Reaction Kinetics · Reaction Rates and Rate Laws
Life Sciences (XL) 2011

If the concentration of KOH in the reaction mixture is doubled, the rate of the reaction will be

Open complete paper
5
2013 · Life Sciences · Reaction Kinetics · Reaction Rates and Rate Laws
Life Sciences (XL) 2013
Velocity of an object fired directly in upward direction is given by \( V = 80 – 32 t \), where \( t \) (time) is in seconds. When will the velocity be between 32 m/sec and 64 m/sec?
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6
2014 · Life Sciences · Reaction Kinetics · Reaction Rates and Rate Laws
Life Sciences (XL) 2014
For a first order reaction, the time required for 50% completion is 20 minutes. The time required for 99.9% completion of the reaction is _____ minutes.
Open complete paper