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Isomerism

JEE Main 2024 (Online) 1st February Evening ShiftNumericalMedium📈 Topic in 14% papers+4
Ques. 1JEE Main 2024, 1 February (Evening Shift)

Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2-methylbutane is .

Answer

6

Solution

2-Methylbutane: ( aCH3)2 bCH- cCH2- dCH3 ⇒ 4 kinds of H (a, b, c, d) ⇒ 4 structural products

(a) ClCH2- CH(CH3)-CH2CH3: chiral ⇒ 2 (d and l)

(b) (CH3)2CCl-CH2CH3: achiral ⇒ 1

(c) (CH3)2CH- CHCl-CH3: chiral ⇒ 2 (d and l)

(d) (CH3)2CH-CH2-CH2Cl: achiral ⇒ 1

∴ Total = 2 + 1 + 2 + 1 = 6

Answer: 6

Keep practising — Isomerism

Ques. 2JEE Main 2024, 30 January (Evening Shift)

Number of geometrical isomers possible for the given structure is/are . [figure]

Ques. 3JEE Main 2024, 30 January (Evening Shift)

2-chlorobutane + Cl2 C4H8Cl2 (isomers) Total number of optically active isomers shown by C4H8Cl2, obtained in the above reaction is .

Ques. 4JEE Main 2024, 29 January (Evening Shift)

Which one of the following will show geometrical isomerism?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2024, 27 January (Morning Shift)

Highest enol content will be shown by:

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6JEE Main 2024, 27 January (Morning Shift)

3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for 'A' is .

Ques. 7JEE Main 2024, 27 January (Evening Shift)

Total number of compounds with Chiral carbon atoms from following is . [figure] CH3-CH2-CH(NO2)-COOH CH3-CH2-CHBr-CH2-CH3 CH3-CH(I)-CH2-NO2 CH3-CH2-CH(OH)-CH2OH CH3- I |CH-CH(I)-C2H5

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