Choose the correct options.

Options

A. Viscosity of liquids increases with temperature
B. Viscosity of gases increases with temperature
C. surface tension of liquids decreases with temperature
D. For angle of contact`(theta)=(0^@)`, liquid neither rises nor falls on capillary

Explanation

To solve the question, we need to evaluate each of the four statements regarding viscosity, surface tension, and angle of contact, and determine which ones are correct.

### Step-by-Step Solution:

1. **Evaluate the first statement: "Viscosity of liquid increases with temperature."**
- Viscosity is a measure of a fluid's resistance to flow. For liquids, as the temperature increases, the kinetic energy of the molecules increases, which reduces the intermolecular forces. This leads to a decrease in viscosity.
- **Conclusion:** This statement is **incorrect**.

2. **Evaluate the second statement: "Viscosity of gases increases with temperature."**
- For gases, as the temperature increases, the kinetic energy of the molecules also increases. This results in more frequent and energetic collisions between the gas molecules, which increases the viscosity.
- **Conclusion:** This statement is **correct**.

3. **Evaluate the third statement: "Surface tension of liquid decreases with temperature."**
- Surface tension is caused by cohesive forces between liquid molecules. As temperature increases, these cohesive forces decrease due to increased molecular motion, leading to a decrease in surface tension.
- **Conclusion:** This statement is **correct**.

4. **Evaluate the fourth statement: "For angle of contact θ = 0°, liquid neither rises nor falls in a capillary."**
- The angle of contact (or wetting angle) determines the behavior of a liquid in a capillary. If θ = 0°, the liquid completely wets the surface, and it will rise in the capillary. The condition for a liquid to neither rise nor fall is when θ = 90°.
- **Conclusion:** This statement is **incorrect**.

### Final Evaluation of Statements:
- Statement 1: Incorrect
- Statement 2: Correct
- Statement 3: Correct
- Statement 4: Incorrect

### Summary of Correct Options:
The correct options are:
- Viscosity of gases increases with temperature.
- Surface tension of liquid decreases with temperature.