Fehling solution A consist of an aqueous solution of copper sulphate while Fehling solution B consists of an alkaline solution of ______.

Explanation

To solve the question regarding Fehling's solution B, we need to identify the component that makes it alkaline.

### Step-by-Step Solution:

1. **Understanding Fehling's Solution**: Fehling's solution is used to differentiate between aldehydes and ketones. It consists of two parts: Fehling solution A and Fehling solution B.

2. **Identifying Fehling Solution A**: We know that Fehling solution A consists of an aqueous solution of copper sulfate (CuSO4). This solution is typically deep blue in color.

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