Density of water is less than 1g/c.c ______

Options

A. at `4^(@)C`
B. above `4^(@)C`
C. below `4^(@)C`
D. Both (2) and (3)

Explanation

To solve the question regarding the density of water being less than 1 g/cm³, we will analyze the behavior of water at different temperatures.

### Step-by-Step Solution:

1. **Understanding Density of Water**:
- Density is defined as mass per unit volume. For water, the density is typically around 1 g/cm³ at 4 degrees Celsius, which is its maximum density.

2. **Behavior of Water Density with Temperature**:
- At 4 degrees Celsius, water has its maximum density of 1 g/cm³.
- When the temperature of water decreases below 4 degrees Celsius, the density of water increases until it reaches this maximum point.
- Conversely, when the temperature increases above 4 degrees Celsius, the density of water decreases.

3. **Analyzing the Options**:
- **Option 1**: At 4 degrees Celsius - The density is exactly 1 g/cm³, not less.
- **Option 2**: Above 4 degrees Celsius - The density of water is less than 1 g/cm³.
- **Option 3**: Below 4 degrees Celsius - The density of water is also less than 1 g/cm³.
- **Option 4**: Both options 2 and 3 - This option states that the density is less than 1 g/cm³ in both scenarios.

4. **Conclusion**:
- Since the density of water is less than 1 g/cm³ above 4 degrees Celsius and also below 4 degrees Celsius, the correct answer is **Option 4: Both 2 and 3**.