Question

Which of the following statements are correct?

i) \( CCl_4 \) undergoes hydrolysis easily.
(ii) Diamond has directional covalent bonds.
(iii)Fullerene is the thermodynamically most stable allotrope of carbon.
(iv)Glass is a man-made silicate.
 

• A. \( i, iii \) only
• B. \( ii, iv \) only
• C. \( ii, iii, iv \) only
• D. \( i, ii \) only

Hint:

Diamond has directional covalent bonds, making it extremely hard. Glass is a synthetic silicate material, while graphite is the most stable allotrope of carbon, not fullerene.

Answer 1

The Correct Option is B

Step 1: Analyzing Each Statement 
1. Statement (i): Incorrect. Carbon tetrachloride (\( CCl_4 \)) does not undergo hydrolysis easily because it lacks vacant \( d \)-orbitals, making it resistant to nucleophilic attack by water molecules. 2. Statement (ii): Correct. Diamond has a tetrahedral structure where each carbon atom is bonded to four other carbon atoms through strong directional covalent bonds, giving it high hardness and rigidity. 3. Statement (iii): Incorrect. Graphite, not fullerene, is the most thermodynamically stable allotrope of carbon due to its lower energy configuration. 4. Statement (iv): Correct. Glass is an amorphous, man-made silicate composed mainly of silica (\( SiO_2 \)), which is fused with other compounds like sodium oxide and calcium oxide. 

Step 2: Evaluating the Given Options 
- Option (1): Incorrect, as a statement (i) is incorrect.
- Option (2): Correct, as statements (ii) and (iv) are the only correct ones.
- Option (3): Incorrect, as a statement (iii) is incorrect.
- Option (4): Incorrect, as a statement (i) is incorrect.
Thus, the correct answer is 

Option (2).