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Hydrocarbons

JEE Main 2024 (Online) 6th April Morning ShiftNumericalEasy📈 Topic in 24% papers+4
Ques. 1JEE Main 2024, 6 April (Morning Shift)

The major product of the following reaction is P. CH3C C - CH3 [ (ii) dil. KMnO4 \ 273 K](i) Na/liq. NH3 'P' Number of oxygen atoms present in product 'P' is . (nearest integer)

Answer

2

Solution

CH3C CCH3 Na/liq. NH3 CH3CH=CHCH3

[273 K]dil. KMnO4 CH3- OH |CH- OH |CH-CH3 (P)

∵ Na/liq. NH3 (anti addition of H) gives trans-but-2-ene; cold dil. KMnO4 adds two –OH (syn) ⇒ P = butane-2,3-diol

∴ oxygen atoms in P = 2

Answer: 2

Keep practising — Hydrocarbons

Ques. 2JEE Main 2024, 5 April (Morning Shift)

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

  1. Both Statement I and Statement II are incorrect
  2. Statement I is correct but Statement II is incorrect
  3. Statement I is incorrect but Statement II is correct
  4. Both Statement I and Statement II are correct
Ques. 3JEE Main 2024, 5 April (Evening Shift)

Consider the given chemical reaction : [figure] Product "A" is :

  1. picric acid
  2. oxalic acid
  3. adipic acid
  4. acetic acid
Ques. 4JEE Main 2024, 1 February (Morning Shift)

Which of the following compound will most easily be attacked by an electrophile?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2024, 1 February (Morning Shift)

Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is . [figure]

Ques. 6JEE Main 2024, 1 February (Evening Shift)

In the given reactions identify A and B [figure] CH3-C C-CH3 + H2 Na/Liquid NH3 “B”

  1. A : n-Pentane B : Cis - 2 - butene
  2. A : 2-Pentyne B : Cis-2-butene
  3. A : n-Pentane B : trans-2-butene
  4. A : 2-Pentyne B : trans-2-butene
Ques. 7JEE Main 2024, 1 February (Evening Shift)

The set of meta directing functional groups from the following sets is :

  1. -CN, -NH2, -NHR, -OCH3
  2. -CN, -CHO, -NHCOCH3, -COOR
  3. -NO2, -NH2, -COOH, -COOR
  4. -NO2, -CHO, -SO3H, -COR
Ques. 8JEE Main 2024, 31 January (Morning Shift)

Number of alkanes obtained on electrolysis of a mixture of CH3COONa and C2H5COONa is .

Ques. 9JEE Main 2024, 31 January (Evening Shift)

Major product of the following reaction is - [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 10JEE Main 2024, 31 January (Evening Shift)

The correct order of reactivity in electrophilic substitution reaction of the following compounds is : [figure]

  1. B > C > A > D
  2. B > A > C > D
  3. D > C > B > A
  4. A > B > C > D
Ques. 11JEE Main 2024, 31 January (Evening Shift)

Number of isomeric products formed by monochlorination of 2-methylbutane in presence of sunlight is .

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