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Karnataka Board PUCPUC Science Class 11

Assertion (A): All the carbon atoms in H2C = C = CH2 are sp2 hybridised Reason (R): In this molecule all the carbon atoms are attached to each other by double bonds.

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Question

Assertion (A): All the carbon atoms in H2C = C = CH2 are sp2 hybridised

Reason (R): In this molecule all the carbon atoms are attached to each other by double bonds.

Options

  • Both A and R are correct and R is the correct explanation of A.

  • Both A and R are correct but R is not the correct explanation of A.

  • Both A and R are not correct.

  • A is not correct but R is correct.

MCQ
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Solution

A is not correct but R is correct.

Explanation:

Since hybridization of C can be found out by counting σ bonds and π bonds present on C atom. This can be shown as-

\[\ce{\overset{3α}{\underset{1π}{CH2}} = \overset{2α}{\underset{2π}{C}} = \overset{3α}{\underset{1π}{CH2}}}\]

If C has 3σ bonds then it is sp2 hybridized. If C has 2σ bonds then it is sp hybridized.

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Chapter 12: Organic Chemistry Some Basic Principles and Techniques - Multiple Choice Questions (Type - I) [Page 155]

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NCERT Exemplar Chemistry Exemplar [English] Class 11
Chapter 12 Organic Chemistry Some Basic Principles and Techniques
Multiple Choice Questions (Type - I) | Q 58 | Page 155

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