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JEE Main 202628 JanuaryEvening Shift
Exam
JEE Main
Year
2026
Date
28 January
Shift
Evening Shift
Subject
Chemistry
Chapter
Haloalkanes and Haloarenes

JEE Main 2026 · 28 January · Evening Shift · Chemistry · Haloalkanes and Haloarenes

Which of the following reaction is NOT correctly represented?

Which of the following reaction is NOT correctly represented?Which of the following reaction is NOT correctly represented?Which of the following reaction is NOT correctly represented?Which of the following reaction is NOT correctly represented?Which of the following reaction is NOT correctly represented?

Options

  1. AThe integral 16 ∫ _ 1 ^ 2 dx x ^ 3 ( x ^ 2 + 2) ^ 2 is equal to
  2. BThe integral 16 ∫ _ 1 ^ 2 dx x ^ 3 ( x ^ 2 + 2) ^ 2 is equal to
  3. CThe integral 16 ∫ _ 1 ^ 2 dx x ^ 3 ( x ^ 2 + 2) ^ 2 is equal to
  4. DThe integral 16 ∫ _ 1 ^ 2 dx x ^ 3 ( x ^ 2 + 2) ^ 2 is equal to

Correct answer

D. The integral 16 ∫ _ 1 ^ 2 dx x ^ 3 ( x ^ 2 + 2) ^ 2 is equal to

Step-by-step solution

Reaction (1): Toluene + Br2Br_2/Fe in dark conditions undergoes electrophilic aromatic substitution on the benzene ring, producing ortho and para bromotoluenes. This is correctly represented.
Reaction (2): The diazonium salt reacts with Cu2Br2Cu_2Br_2/HBr via the Sandmeyer reaction to produce bromobenzene. This is correctly represented.
Reaction (3): Toluene + Br2Br_2 with light (hνh\nu) undergoes free radical substitution at the benzylic position, producing benzyl bromide (CH₂Br). This is correctly represented.
Reaction (4): Cyclohexene is shown producing an allylic bromination product, but cyclohexene with Br2Br_2 and light undergoes electrophilic addition across the C=C double bond to form dibromocyclohexene or undergoes addition rather than simple allylic substitution. This representation is incorrect.
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