Question

Evaluate the following statements related to group 14 elements for their correctness.
(A) Covalent radius decreases down the group from C to Pb in a regular manner.
(B) Electronegativity decreases from C to Pb down the group gradually.
(C) Maximum covalence of C is 4 whereas other elements can expand their covalence due to presence of d orbitals.
(D) Heavier elements do not form ppi-ppi bonds.
(E) Carbon can exhibit negative oxidation states.
Choose the correct answer from the options given below:

• A. (C), (D) and (E) Only
• B. (A) and (B) Only
• C. (A), (B) and (C) Only
• D. (C) and (D) Only

Answer 1

Answer: (A)

(C), (D) and (E) Only

Answer 2

(A) Down the group, radius increases.

(B) EN does not decrease gradually from C to Pb.

(C) Correct.

(D) Correct.

(E) Range of oxidation state of carbon: $-4$ to $+4$.
Thus the correct answer is Option 1.