Diphenylamine is less ........ than aniline.

Explanation

To solve the question "Diphenylamine is less ........ than aniline," we need to analyze the basicity of diphenylamine in comparison to aniline. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Structures
- **Aniline** has the structure C6H5-NH2, where the amino group (-NH2) is attached to a single phenyl group (benzene ring).
- **Diphenylamine** has the structure C6H5-NH-C6H5, where the amino group is attached to two phenyl groups.

### Step 2: Analyze the Lone Pair on Nitrogen
- In both aniline and diphenylamine, the nitrogen atom has a lone pair of electrons.
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