Write the effect of dilute hydrochloric acid on the colour of the following indicators:
Red litmus

Explanation

### Step-by-Step Solution:

1. **Understanding Litmus Paper**:
- Litmus paper is a pH indicator used to determine whether a solution is acidic or basic. There are two types of litmus paper: red and blue.

2. **Behavior of Red Litmus Paper**:
- Red litmus paper is used to test for basic solutions. It remains red when it comes into contact with an acidic solution and does not change color.

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