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Organic Chemistry – Some Basic Principles and Techniques · Question 8

JEE Main 2026 (Online) 4th April Evening ShiftMatchingEasy📈 Topic in 3% papers+4−1
1

Match the LIST-I with LIST-II Choose the correct answer from the options given below:

  1. A-III, B-I, C-II, D-IV
  2. A-III, B-IV, C-II, D-I
  3. A-III, B-IV, C-I, D-II
  4. A-I, B-III, C-IV, D-II

Answer

(3) A-III, B-IV, C-I, D-II

Solution

A. Williamson synthesis: R-X + R'-O-Na+ R-O-R' + NaX; the alkoxide ion (nucleophile) displaces X- by SN2 ⇒ nucleophilic substitution (III)

B. Friedel–Crafts reaction: the electrophile (R+ or RCO+, formed with anhydrous AlCl3) replaces an H of the benzene ring ⇒ electrophilic substitution (IV)

C. Bromination of vinyl benzene (styrene): Br2 adds across the side-chain C=C ⇒ C6H5CHBr-CH2Br ⇒ electrophilic addition (I)

D. Chlorination of toluene in light: chlorine free radicals replace the side-chain H ⇒ C6H5CH2Cl (then C6H5CHCl2, C6H5CCl3) ⇒ free radical substitution (II)

∴ A-III, B-IV, C-I, D-II

Answer: (3)

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2

Consider the following molecules/species : [figure] The correct order of carbon-oxygen double bond length is :

  1. x > y > z
  2. y > z > x
  3. z > x > y
  4. x > z > y
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3

The descending order of acidity among the following compounds is : [figure] Choose the correct answer from the options given below :

  1. B > D > E > A > C
  2. D > B > E > A > C
  3. C > A > B > D > E
  4. D > E > B > A > C
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4

The strongest conjugate acid will result from:

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
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5

In IUPAC nomenclature, the correct order of decreasing priority of functional group is :

  1. -CONH2, >C=O, -CHO, -NH2, -C C-
  2. -CONH2, -COOCH3, -CHO, -NH2, -OH
  3. -CONH2, -CHO, >C=O, -NH2, -C C-
  4. -CONH2, -CHO, -CN, -NH2, -C C-
JEE Main 2026 (Online) 2nd April Morning Shift
6

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
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7

CORRECT order of stability for the following is CH2=CH-, CH3-CH2-, CH C-

  1. CH C- > CH3-CH2- > CH2=CH-
  2. CH2=CH- > CH C- > CH3-CH2-
  3. CH C- > CH2=CH- > CH3-CH2-
  4. CH3-CH2- > CH2=CH- > CH C-
JEE Main 2026 (Online) 28th January Morning Shift
8

The cyclic cations having the same number of hyperconjugation are : Choose the correct answer from the options given below :

  1. B and C Only
  2. A and B Only
  3. A and C Only
  4. A, C and D Only
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9

Arrange the following alkenes in decreasing order of stability. [figure] Choose the correct answer from the options given below:

  1. III > I > II > IV
  2. III > II > I > IV
  3. I > III > II > IV
  4. I > III > IV > II
JEE Main 2026 (Online) 24th January Morning Shift
10

Arrange the following carbanions in the decreasing order of stability. I. p-Br-C6H4- CH2 II. C6H5- CH2 III. p-CH3O-C6H4- CH2 IV. p-CHO-C6H4- CH2 V. p-CH3-C6H4- CH2 Choose the correct answer from the options given below :

  1. I > II > IV > V > III
  2. IV > II > I > III > V
  3. I > IV > II > V > III
  4. IV > I > II > V > III
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11

Find out the statements which are not true. Choose the correct answer from the options given below :

  1. A, D & E only
  2. A, C & D only
  3. B & D only
  4. B, D & E only
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