Give a chemical test to distinguish between a primary and a secondary amine.

Explanation

To distinguish between a primary amine (RNH2) and a secondary amine (R2NH), we can use the following chemical test:

### Step-by-Step Solution:

1. **Preparation of the Sample**: Take a small amount of the amine sample you want to test. Ensure that you know whether it is a primary or secondary amine.

2. **Addition of Ninhydrin**: Add a few drops of ninhydrin solution to the amine sample in a test tube. Ninhydrin is a reagent that reacts with amino compounds.

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