Assertion: Carbon atom is tetravalent though it has two unpaired electrons. Reason: Carbon has unique ability to form pπ-pπ multiple bonds with itself like C=C, C≡ C.

Question

Assertion: Carbon atom is tetravalent though it has two unpaired electrons. Reason: Carbon has unique ability to form pπ-pπ multiple bonds with itself like C=C, C≡ C. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

In carbon, only s and p-orbitals are available for bonding and therefore, it can accommodate only four pairs of electrons around it. This would limit the maximum covalence to four in carbon. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/9f5f4e56cd99c922382aee7ca27b06bf-.png" />

Q. Assertion : Carbon atom is tetravalent though it has two unpaired electrons.
Reason : Carbon has unique ability to form $p π - p π$ multiple bonds with itself like $C = C, C \equiv C$ .

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

In carbon, only $s$ and $p$ -orbitals are available for bonding and therefore, it can accommodate only four pairs of electrons around it. This would limit the maximum covalence to four in carbon.

Q. Assertion : Carbon atom is tetravalent though it has two unpaired electrons. Reason : Carbon has unique ability to form pπ−pπ multiple bonds with itself like C=C,C≡C.