Colloidal solution show in `H_(2)O` :-

Options

A. Paramagnetism
B. Scttering of light (tyndall effect)
C. Refraction
D. All of these

Answer

To solve the question regarding the behavior of colloidal solutions in water (H₂O), we will follow these steps:

### Step 1: Understand the Definition of Colloidal Solutions
A colloidal solution is a mixture where very small particles of one substance are dispersed throughout another substance. These particles are larger than molecules but too small to be seen with the naked eye.

**Hint:** Recall that colloids consist of two phases: the dispersed phase and the continuous phase.

### Step 2: Identify the Key Property of Colloidal Solutions
One of the key properties of colloidal solutions is the Tyndall effect. This effect occurs when light is scattered by the particles in a colloid, making the path of the light beam visible.

**Hint:** Think about how light behaves when it passes through different mediums, especially when particles are present.

### Step 3: Apply the Tyndall Effect to Colloidal Solutions in Water
When a colloidal solution is present in water, it will scatter light due to the presence of the dispersed particles. This scattering is what is referred to as the Tyndall effect.

**Hint:** Consider what happens when you shine a flashlight through a foggy environment versus a clear one.

### Step 4: Analyze the Options Given
The question presents options A, B, C, and D. Since we established that colloidal solutions in water exhibit the Tyndall effect, we need to identify which option correctly states this property.

**Hint:** Look for keywords in the options that relate to light scattering or the Tyndall effect.

### Step 5: Conclude the Correct Option
Based on our analysis, the correct option that indicates the presence of the Tyndall effect in colloidal solutions in water is option B. The other options (A, C, D) do not correctly describe the behavior of colloidal solutions.

**Hint:** Remember that only one option can be correct based on the properties of colloids.

### Final Answer
The correct option is **B**. Colloidal solutions in water show the Tyndall effect, which is the scattering of light.