Name one metal in following fitting the given description. Also, write the equation of the reaction.
A metal which floats on water, reacts with it and forms an alkali.

Explanation

To solve the question, we need to identify a metal that floats on water, reacts with it, and produces an alkali. Let's break down the solution step by step.

### Step 1: Identify the Metal
We need to find a metal that has a density less than that of water (1 g/cm³) so that it can float.

**Hint:** Remember that metals like sodium and potassium are known for their low density and reactivity with water.

### Step 2: Confirm the Density of the Metal
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