Isomerism
Previous year questions with solutions · 2000 – 2026
40Questions
26Papers covered
2.22%Weightage 2026▼ 66.7% vs last year
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Year-wise statistics questions · papers · average per paper · weightage
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 2 | 2 | 1 | 2.22% ▼ 66.7% vs last year |
| 2025 | 3 | 1 | 3 | 6.67% ▲ 573.3% vs last year |
| 2022 | 1 | 2 | 0.5 | 0.99% ▼ 75.2% vs last year |
| 2021 | 2 | 1 | 2 | 4.00% ▲ 80% vs last year |
| 2017 | 1 | 1 | 1 | 2.22% ▼ 50% vs last year |
| 2016 | 4 | 2 | 2 | 4.44% same as last year |
| 2015 | 4 | 2 | 2 | 4.44% ▲ 100% vs last year |
| 2014 | 1 | 1 | 1 | 2.22% ▼ 34.1% vs last year |
| 2013 | 3 | 2 | 1.5 | 3.37% ▲ 169.7% vs last year |
| 2012 | 1 | 2 | 0.5 | 1.25% ▲ 1.3% vs last year |
| 2011 | 1 | 2 | 0.5 | 1.23% ▼ 50.6% vs last year |
| 2010 | 2 | 2 | 1 | 2.50% ▲ 27.5% vs last year |
| 2009 | 1 | 1 | 1 | 1.96% same as last year |
| 2008 | 1 | 1 | 1 | 1.96% ▼ 51% vs last year |
| 2007 | 2 | 1 | 2 | 4.00% ▲ 100% vs last year |
| 2006 | 1 | 1 | 1 | 2.00% ▼ 50% vs last year |
| 2005 | 2 | 1 | 2 | 4.00% ▲ 92% vs last year |
| 2004 | 1 | 1 | 1 | 2.08% ▼ 49% vs last year |
| 2003 | 2 | 1 | 2 | 4.08% ▲ 104.1% vs last year |
| 2002 | 1 | 1 | 1 | 2.00% ▼ 49% vs last year |
| 2001 | 2 | 1 | 2 | 3.92% same as last year |
| 2000 | 2 | 1 | 2 | 3.92% |
Ques. 32AIPMT 2005
Which one of the following pairs represents stereoisomerism?
- Structural isomerism and geometrical isomerism
- Optical isomerism and geometrical isomerism
- Chain isomerism and rotational isomerism
- Linkage isomerism and geometrical isomerism.
Ques. 33AIPMT 2004
The molecular formula of diphenylmethane, [figure] is C13H12. How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom?
- 6
- 4
- 8
- 7
Ques. 34AIPMT 2003
Which of the following pairs of compounds are enantiomers?
- [figure]
- [figure]
- [figure]
- [figure]
Ques. 35AIPMT 2003
In this reaction : CH3CHO + HCN CH3CH(OH)CN HOH CH3CH(OH)COOH an asymmetric centre is generated. The acid obtained would be
- D-isomer
- L-isomer
- 50% D + 50% L-isomer
- 20% D + 80% L-isomer
Ques. 36AIPMT 2002
Geometrical isomers differ in
- position of functional group
- position of atoms
- spatial arrangement of atoms
- length of carbon chain
Ques. 37AIPMT 2001
A compound of molecular formula C7H16 shows optical isomerism, compound will be
- 2,3-dimethylpentane
- 2,2-dimethylbutane
- 2-methylhexane
- none of these
Ques. 38AIPMT 2001
[figure] obtained by chlorination of n-butane will be
- meso form
- racemic mixture
- d-form
- l-form
Ques. 39AIPMT 2000
2-Butene shows geometrical isomerism due to
- restricted rotation about double bond
- free rotation about double bond
- free rotation about single bond
- chiral carbon