Question

Match the column A (type of crystalline solid) with the column B (example for each type) :

A		B
P.	Molecular Solid	i.	SiC
Q.	Ionic Solid	ii.	Mg
R.	Metallic Solid	iii.	H2O
S.	Network Solid	iv.	MgO

• A. P-iii, Q-i, R-ii, S-iv
• B. P-iv, Q-iii, R-ii, S-i
• C. P-ii, Q-iv, R-iii, S-i
• D. P-iii, Q-iv, R-ii, S-i

Answer 1

The Correct Option is D

Let's match the types of crystalline solids (Column A) with suitable examples (Column B): 

Detailed Explanation:

• Molecular Solid (P):
  • Example: H₂O (ice), molecules held by intermolecular hydrogen bonds (van der Waals forces).
• Ionic Solid (Q):
  • Example: MgO (magnesium oxide), ions held by electrostatic forces.
• Metallic Solid (R):
  • Example: Mg (magnesium metal), metal atoms surrounded by a "sea of electrons".
• Network Solid (S):
  • Example: SiC (silicon carbide), atoms connected by covalent bonds in an extensive network.

Matched pairs:

• P → H₂O (iii)
• Q → MgO (iv)
• R → Mg (ii)
• S → SiC (i)

Conclusion:

The correct matched set is:

P-iv, Q-iii, R-ii, S-i, which corresponds to Option (B).

Correct Answer: Option (B)