63. Assertion (A): All the carbon atoms in H2C=C=CH2 are sp2 hybridized
Reason (R): In this molecule, all the carbon atoms are attached to each other by double bonds.
(i) Both A and R are correct, and R is the correct explanation of A.
(ii) Both A and R are correct, but R is not the correct explanation of A.
(iii) Both A and R are not correct.
(iv) A is not correct but R is correct.
63. Assertion (A): All the carbon atoms in H2C=C=CH2 are sp2 hybridized
Reason (R): In this molecule, all the carbon atoms are attached to each other by double bonds.
(i) Both A and R are correct, and R is the correct explanation of A.
(ii) Both A and R are correct, but R is not the correct explanation of A.
(iii) Both A and R are not correct.
(iv) A is not correct but R is correct.
This is a Assertion Type Questions as classified in NCERT Exemplar
63. Option (iv) i.e., A is not correct, but R is correct is the answer since hybridization of C can be found out by counting σ bonds and π bonds present on C atom. This can be shown as-

If C has 3σ bonds then it is sp2 hybridized. If C
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Chemistry NCERT Exemplar Solutions Class 11th Chapter Twelve 2025
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