Differentiate between the following pairs on the basis of what is given in the brackets :
Tidal volume and Residual volume (Volume of air in normal adults.)

Explanation

### Step-by-Step Solution:

1. **Definition of Tidal Volume**:
- Tidal volume (TV) is defined as the amount of air that is inhaled or exhaled during normal breathing without any force. It represents the volume of air exchanged in a single breath.

2. **Definition of Residual Volume**:
- Residual volume (RV) is the amount of air that remains in the lungs after a forceful exhalation. This volume cannot be expelled from the lungs and is important for keeping the alveoli open.

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