Question

Assertion :In $C{O}_2$ molecule, C-atom undergoes $s{p}^2$ hybridisation.
Reason: $C{O}_2$ molecule has net dipole moment zero.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• C. Assertion is incorrect but Reason is correct.
• D. Both Assertion and Reason are incorrect.

Answer 1

The correct option is C Assertion is incorrect but Reason is correct.

Answer:-

Assertion $\to$ The hybridization state of carbon in carbon dioxide is sp. Two sp hybridized orbitals of carbon atom overlap with two p-orbitals of oxygen atom to form 2$\sigma$ bond while other two electrons of carbon are involved in $p\pi -p\pi$ bonding with oxygen atom.

Reason $\to$ $:\ddot{O}=C=\ddot{O}:$

The C-O bonds in carbon dioxide are polar and yet the dipole moment is zero because the 2 bond dipoles cancel each other. Since the ends are same, the electron pulls same for both oxygen atoms and hence, there is no dipole moment.