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Saturday, 10 October

JEE Main 2024 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 9 April 2024, Shift 2, Chemistry Q76

Question 76 of 90 in this shift, Chemistry question 16 of 30, Section A.

Total number of stereo isomers possible for the given structure :

The figure, in words

Skeletal structure: left alkene carbon bearing a methyl (up-left) and Br (down-left), double bonded to a CH, then CH2, then a CH carrying Br (drawn up), then a second C=C whose right-hand carbon carries Br (up-right) and a methyl, and whose left-hand carbon carries a methyl. Three Br atoms in total (left, middle, right).
  1. (1)88Official answer
  2. (2)33
  3. (3)22
  4. (4)44

Official answer

Option 1

NTA final key.

Chapter
Haloalkanes and Haloarenes
Topic
Stereoisomerism
Idea tested
Calculating Total Stereoisomers

Same topic in other shifts

All Stereoisomerism questions
  1. 4 Apr 2026, Shift 2 · Q65The following structures are [figure: stereocentre C with Br (up), CH3 (hashed, left), Me (down), Cl (wedge, right)] and [figure:…EasyDiagram basedHas a figure
  2. 7 Apr 2025, Shift 2 · Q65Given below are two statements : Statement (I) : [figure: cis-1,2-dichloroethene] is more polar than [figure: cis-1,2-dibromoethene].…MediumTwo statementsHas a figure
  3. 6 Apr 2024, Shift 2 · Q75The incorrect statement regarding the geometrical isomers of 2-butene is :EasySingle correct
  4. 8 Apr 2024, Shift 1 · Q88The number of optical isomers in following compound is:__________ [figure: three fused cyclohexane rings in a linear (anthracene-type)…HardNumerical valueHas a figure
  5. 30 Jan 2024, Shift 2 · Q87Number. of geometrical isomers possible for the given structure is/are ________.MediumNumerical valueHas a figure
  6. 30 Jan 2024, Shift 2 · Q882-chlorobutane + Cl2→C4H8Cl2\mathrm{Cl_2} \to \mathrm{C_4H_8Cl_2} (isomers) Total number of optically active isomers shown by…HardNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.