What happens when a test-tube full of water is :
poured on cemented floor ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Surface**: When we pour water on a surface, the characteristics of that surface determine how the water behaves. In this case, we are dealing with a cemented floor.

2. **Characteristics of Cemented Floor**: A cemented floor is tightly packed and does not have any pores. Pores are small openings that allow water to seep through.

3. **Pouring Water on Cemented Floor**: When we pour a test tube full of water onto the cemented floor, the water encounters the solid, non-porous surface.

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