Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?

Explanation

To determine the nature of ammonia based on its effect on litmus paper, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Litmus Paper**: Litmus paper is a pH indicator used to test whether a substance is acidic or basic. There are two types of litmus paper: red and blue.
- Red litmus paper turns blue in the presence of a base.
- Blue litmus paper turns red in the presence of an acid.

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