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Hydrocarbons

JEE Main 2024 (Online) 5th April Morning ShiftMCQEasy📈 Topic in 20% papers+4−1
Ques. 1JEE 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

Answer

(2) Statement I is correct but Statement II is incorrect

Solution

Formation of the electrophile in nitration:

HNO3 + H2SO4 H2 O-NO2 + HSO4-

H2 O-NO2 H2O + NO2 ⇒ the given step ⇒ Statement I is correct

∵ electrophiles are generated by Lewis / protic acids (H2SO4, AlCl3, FeBr3); a Lewis base donates its lone pair to the electrophile and destroys it ⇒ Statement II is incorrect

Answer: (2)

Keep practising — Hydrocarbons

Ques. 2JEE 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. 3JEE 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. 4JEE Main 2024, 1 February (Morning Shift)

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

Ques. 5JEE 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. 6JEE 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. 7JEE Main 2024, 31 January (Morning Shift)

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

Ques. 8JEE Main 2024, 31 January (Evening Shift)

Major product of the following reaction is - [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9JEE 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. 10JEE Main 2024, 31 January (Evening Shift)

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

Ques. 11JEE Main 2024, 30 January (Morning Shift)

Compound A formed in the following reaction reacts with B to give the product C. Find out A and B. CH3-C CH + Na A B CH3- (C)C C-CH2- CH3 |CH2 + NaBr

  1. A = CH3-C -C Na+, B = CH3-CH2-CH2-Br
  2. A = CH3-CH=CH2, B = CH3-CH2-CH2-Br
  3. A = CH3-C -C Na+, B = CH3-CH2-CH3
  4. A = CH3-CH2-CH3, B = CH3-C CH

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