Question

Statement 1 : Carbon has unique ability to form $p\pi -p\pi$ multiple bonds with itself and with other atoms of small size and high electronegativity
Statement 2 : Heavier elements of group $14$th do not form $p\pi -p\pi$ bonds because their atomic orbitals are too large and diffuse to have effective sideways overlapping

• A. If both Statement $1$ and Statement $2$ are true and the statement $2$ is the correct explanation of the statement $1$
• B. If both Statement $1$ and Statement $2$ are true but statement $2$ is not the correct explanation of the statement $1$
• C. If Statement $1$ is true but Statement $2$ is false
• D. If Statement $1$ is false but Statement $2$ is true

Answer 1

Answer: (B)

Both statements are true but statement $2$ is not true explanation (directly not but indirectly true) of statement $1$ Atomic size of carbon is smaller and thus it has effective overlapping with itself and with other atoms of small size and high electronegativity. Few examples of multiple bonding are $C=C,C\equiv C,C=O,C=S$ and $C\equiv N$. Heavier elements do not form $p\pi -p\pi$ bonds because their atomic orbitals are too large and diffuse to have effective overlapping.