A shopkeeper has a few bottles of soft drinks in his restaurant which are not labelled. One customer wants acidic drink, another wants basic drink and the third one wants neutral drink. How will the shopkeeper decide which drink is to be served to chests?

Explanation

To determine which soft drink to serve to each customer based on their preference for acidic, basic, or neutral drinks, the shopkeeper can follow these steps:

### Step-by-Step Solution:

1. **Gather Materials**: The shopkeeper needs to have red and blue litmus paper on hand. Litmus paper is a pH indicator that changes color in response to acidic or basic substances.

2. **Test the Drinks**: The shopkeeper should dip a piece of red litmus paper into each bottle of soft drink one at a time.

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