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Organic Chemistry – Some Basic Principles and Techniques · Question 65

AIPMT 2003MCQEasy📈 Topic in 0% papers+4−1
1

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

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

Answer

(1) [figure]

Solution

(1) Chlorination of the side chain of toluene by Cl2 at boiling temperature (heat / light) proceeds through free radicals:

Cl2 2Cl ; C6H5CH3 + Cl C6H5 CH2 + HCl; C6H5 CH2 + Cl2 C6H5CH2Cl + Cl

free-radical substitution.

(2) Friedel–Crafts alkylation electrophilic substitution.

(3) C6H5CH2Cl + AgNO2 nucleophilic substitution.

(4) CH3CHO + HCN nucleophilic addition.

Answer: (1)

AIPMT 2003

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2

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
3

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

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

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
5

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
6

Which is maximum stable?

  1. 1-Butene
  2. cis-2-Butene
  3. trans-2-Butene
  4. All have same stability.
AIPMT 2000
7

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

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