Colloids consist of……….phase, viz, ………….and …………………. .

Answer

To answer the question regarding the composition of colloids, we can break it down into a step-by-step solution:

### Step 1: Understand the Definition of Colloids
Colloids are heterogeneous mixtures where the particle size ranges from 1 to 1000 nanometers. These particles are not visible to the naked eye but can be observed using an ultramicroscope.

### Step 2: Identify the Phases in Colloids
Colloids consist of two distinct phases:
1. **Dispersed Phase**: This is the phase that contains the particles that are dispersed throughout the medium. It is present in a smaller proportion, similar to the solute in a solution.
2. **Dispersion Medium**: This is the phase that surrounds and supports the dispersed phase. It is present in excess, akin to the solvent in a solution.

### Step 3: Fill in the Blanks
Based on the definitions and understanding of colloids, we can fill in the blanks in the question:
- Colloids consist of **two** phases, viz, **dispersed phase** and **dispersion medium**.

### Final Answer
Colloids consist of **two** phases, viz, **dispersed phase** and **dispersion medium**.

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