Match the following:
Column I
(A) Density (B) Melting point
(C) Electro negativity (D) Metallic charcter
Column II (p) Increases from carbon to lead
(q) Decreases from carbon to tin and then increases
(r) Decreases from diamond to silicon and then increases
(s) Decreases from carbon to silicon and then it is almost same
(t) Decrease from carbon to lead

Answer

To solve the matching question between Column I and Column II, we will analyze each property in Column I and determine its corresponding variation from Column II.

### Step-by-Step Solution:

1. **Density (A)**:
- The density of elements generally increases as we move down the group. However, carbon in its diamond form has a higher density than silicon. Therefore, the density decreases from diamond to silicon and then increases as we go down the group.
- **Match**: (A) Density → (r) Decreases from diamond to silicon and then increases.

2. **Melting Point (B)**:
- The melting point tends to decrease as we move down the group due to the increasing size of the atoms and the weakening of intermolecular forces. However, it decreases up to tin and then increases for lead.
- **Match**: (B) Melting Point → (q) Decreases from carbon to tin and then increases.

3. **Electronegativity (C)**:
- Electronegativity decreases as we move down the group because the atomic size increases, making it harder for the nucleus to attract electrons. The electronegativity decreases from carbon to silicon and remains almost the same thereafter.
- **Match**: (C) Electronegativity → (s) Decreases from carbon to silicon and then it is almost the same.

4. **Metallic Character (D)**:
- The metallic character increases down the group as the atomic size increases and the outer electrons are further from the nucleus, making it easier to lose electrons. Thus, metallic character increases from carbon to lead.
- **Match**: (D) Metallic Character → (p) Increases from carbon to lead.

### Final Matches:
- (A) Density → (r)
- (B) Melting Point → (q)
- (C) Electronegativity → (s)
- (D) Metallic Character → (p)