JEE Main · 2022 · 24 Jun 2022 · Shift 2 · Chemical Bonding and Molecular Structure

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Given below are two statements.

Statement I : The presence of weaker π-bonds make alkenes less stable than alkanes.

Statement II : The strength of the double bond is greater than that of carbon-carbon single bond.

In the light of the above statements, choose the correct answer from the options given below.
  1. (A)Both Statement I and Statement II are correct.✓ Correct
  2. (B)Both Statement I and Statement II are incorrect.
  3. (C)Statement I is correct but Statement II is incorrect.
  4. (D)Statement I is incorrect but Statement II is correct.

Answer: (A)

Solution

Statement I is correct: alkenes contain a π-bond which is weaker than a σ-bond, making alkenes less stable than alkanes. Statement II is also correct: the overall C=C double bond (σ + π) is stronger than a C–C single bond (σ only), even though the π component alone is weaker. Both statements are true.

JEE Main · 2022 · 24 Jun 2022 · Shift 2 · Single correct option

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