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Organic Chemistry – Some Basic Principles and Techniques

Previous year questions with solutions · 2000 – 2026

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71Questions
33Papers covered
3.33% ↑50%Weightage in 2026
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’01
’02
’03
’05
’06
’07
’08
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Year-wise statistics questions · papers · average per paper · weightage
YearQuestionsPapersAvg / paperWeightage
2026321.53.33% ↑50%
20251112.22% ↓43.9%
20244223.96% ↑1%
20232123.92% ↓1%
20224223.96% ↑98%
20211112.00% ↓10%
20201112.22% →0%
20191112.22% ↓66.7%
20183136.67% →0%
20173136.67% ↑50%
20164224.44% ↓42.9%
2015723.57.78% ↑250%
20141112.22% ↓75.3%
20138248.99% ↑619.1%
2012120.51.25% ↓49.4%
20112212.47% ↓34.2%
2010321.53.75% ↓4.4%
20092123.92% ↓50%
20084147.84% ↑96.1%
20072124.00% ↓33.3%
20063136.00% ↑50%
20052124.00% ↓34.7%
20033136.12% ↑53.1%
20022124.00% ↑2%
20012123.92% →0%
20002123.92%

71 questions · newest paper first · page 3 of 3

61

Names of some compounds are given. Which one is not in IUPAC system?

  1. CH3-CH2-CH2- CH2CH3 |CH- CH3 |CH-CH2CH3 3-Methyl-4-ethylheptane
  2. CH3- OH |CH- CH3 |CH-CH3 3-Methyl-2-butanol
  3. CH3-CH2- CH2 \|C- CH3 |CH-CH3 2-Ethyl-3-methylbut-1-ene
  4. CH3-C C-CH(CH3)2 4-Methyl-2-pentyne
AIPMT 2005
62

Which amongst the following is the most stable carbocation?

  1. CH3
  2. CH3 CH2
  3. CH3- CH3 | CH
  4. CH3- CH3 | CH3 | C
AIPMT 2005
63

Name of the compound given below is [figure]

  1. 4-ethyl-3-methyloctane
  2. 3-methyl-4-ethyloctane
  3. 2,3-diethylheptane
  4. 5-ethyl-6-methyloctane
AIPMT 2003
64

Which one of the following orders of acid strength is correct ?

  1. RCOOH > ROH > HOH > HC CH
  2. RCOOH > HOH > ROH > HC CH
  3. RCOOH > HOH > HC CH > ROH
  4. RCOOH > HC CH > HOH > ROH
AIPMT 2003
65

Which one of the following is a free-radical substitution reaction ?

  1. [figure]
  2. [figure]
  3. [figure]
  4. CH3CHO + HCN CH3CH(OH)CN
AIPMT 2003
66

IUPAC name of the following is CH2=CH-CH2-CH2-C CH

  1. 1-hexyne-5-ene
  2. 1,5-hexenyne
  3. 1-hexene-5-yne
  4. 1,5-hexynene
AIPMT 2002
67

CH2- O \|C-CH3 and CH2= O |C-CH3 are

  1. resonating structures
  2. tautomers
  3. geometrical isomers
  4. optical isomers
AIPMT 2002
68

The incorrect IUPAC name is

  1. CH3- O \|C- CH3 |CH-CH3 2-methyl-3-butanone
  2. CH3- CH3 |CH- CH2CH3 |CH-CH3 2,3-dimethylpentane
  3. CH3-C CCH(CH3)2 4-methyl-2-pentyne
  4. CH3 Cl |CH Br |CHCH3 2-bromo-3-chlorobutane
AIPMT 2001
69

The correct acidic order of the following is [figure]

  1. I > II > III
  2. III > I > II
  3. II > III > I
  4. I > III > II
AIPMT 2001
70

Which is maximum stable?

  1. 1-Butene
  2. cis-2-Butene
  3. trans-2-Butene
  4. All have same stability.
AIPMT 2000
71

Polarisation in acrolein can be described as

  1. + CH2=CH- + CHO
  2. - CH2=CH- + CHO
  3. - CH2=CH-CH + O
  4. + CH2=CH-CH - O
AIPMT 2000