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Previous year question hub

Structure-Reactivity Correlations and Organic Reaction Mechanisms - Life Sciences Previous Year Questions

Practice Structure-Reactivity Correlations and Organic Reaction Mechanisms - Life Sciences previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

19Papers
19Years
81Questions
1Topics

Structure-Reactivity Correlations and Organic Reaction Mechanisms question pattern

Every graph below is calculated only from this selection.

Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

Medium 64 79%
Hard 9 11.1%
Easy 8 9.9%

Question type distribution

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

MCQ 65 80.2%
MSQ 9 11.1%
Numerical Answer Type (NAT) 7 8.6%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
81 Qs

Most asked topics

Top topics across the included previous year papers.

Structure-Reactivity Correlations and Organic Reaction Mechanisms
81 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Substitution, Elimination and Addition Reactions
45 Qs
Electronic Effects, Stereochemistry and Aromaticity
31 Qs
Organic Reagents and Functional-group Tests
5 Qs

Paper coverage

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

Life Sciences (XL) 2026
2 Qs
Life Sciences (XL) 2025
3 Qs
Life Sciences (XL) 2024
5 Qs
Life Sciences (XL) 2023
5 Qs
Life Sciences (XL) 2022
3 Qs
Life Sciences (XL) 2021
3 Qs
Life Sciences (XL) 2020
1 Qs
Life Sciences (XL) 2019
6 Qs
Life Sciences (XL) 2018
5 Qs
Life Sciences (XL) 2017
5 Qs
Life Sciences (XL) 2016
3 Qs
Life Sciences (XL) 2014
2 Qs
Life Sciences (XL) 2013
2 Qs
Life Sciences (XL) 2012
4 Qs
Life Sciences (XL) 2011
4 Qs
Life Sciences (XL) 2010
4 Qs
Life Sciences (XL) 2009
6 Qs
Life Sciences (XL) 2008
9 Qs
Life Sciences (XL) 2007
9 Qs

Browse by subtopics

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

Substitution, Elimination and Addition Reactions

Explore previous-paper coverage, trends and focused practice for Substitution, Elimination and Addition Reactions.

45 questions18 papers18 years

Electronic Effects, Stereochemistry and Aromaticity

Explore previous-paper coverage, trends and focused practice for Electronic Effects, Stereochemistry and Aromaticity.

31 questions18 papers18 years

Organic Reagents and Functional-group Tests

Explore previous-paper coverage, trends and focused practice for Organic Reagents and Functional-group Tests.

5 questions5 papers5 years

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper nameYearPDFAttempt
Life Sciences (XL) 20262026
2 questions in this view		2026
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Life Sciences (XL) 20252025
3 questions in this view		2025
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20242024
5 questions in this view		2024
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20232023
5 questions in this view		2023
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20222022
3 questions in this view		2022
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20212021
3 questions in this view		2021
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20202020
1 questions in this view		2020
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Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20192019
6 questions in this view		2019
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Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20182018
5 questions in this view		2018
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20172017
5 questions in this view		2017
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Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20162016
3 questions in this view		2016
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Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20142014
2 questions in this view		2014
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Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20132013
2 questions in this view		2013
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Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20122012
4 questions in this view		2012
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20112011
4 questions in this view		2011
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20102010
4 questions in this view		2010
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20092009
6 questions in this view		2009
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20082008
9 questions in this view		2008
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20072007
9 questions in this view		2007
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Official documents
Official question paperOriginal authority-issued PDF Official Download

Sample previous year questions

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

1
2007 · Life Sciences · Structure-Reactivity Correlations and Organic Reaction Mechanisms · Substitution, Elimination and Addition Reactions
Life Sciences (XL) 2007
The product ‘P’ formed in the following reaction is
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2
2008 · Life Sciences · Structure-Reactivity Correlations and Organic Reaction Mechanisms · Electronic Effects, Stereochemistry and Aromaticity
Life Sciences (XL) 2008

Among the following four amines, which one is least basic in aqueous solution?

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3
2009 · Life Sciences · Structure-Reactivity Correlations and Organic Reaction Mechanisms · Electronic Effects, Stereochemistry and Aromaticity
Life Sciences (XL) 2009

The most stable carbocation among the following is

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4
2010 · Life Sciences · Structure-Reactivity Correlations and Organic Reaction Mechanisms · Electronic Effects, Stereochemistry and Aromaticity
Life Sciences (XL) 2010

Among heptan-1-ol, heptan-2-ol, heptan-3-ol and heptan-4-ol, compounds those exhibit optical activity are

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5
2011 · Life Sciences · Structure-Reactivity Correlations and Organic Reaction Mechanisms · Electronic Effects, Stereochemistry and Aromaticity
Life Sciences (XL) 2011
Electrophile among the following is
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6
2012 · Life Sciences · Structure-Reactivity Correlations and Organic Reaction Mechanisms · Substitution, Elimination and Addition Reactions
Life Sciences (XL) 2012
It is due to
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