Mention two important features of solid catalysts and explain then with the help of suitable example .

Explanation

**Step-by-Step Text Solution:**

1. **Introduction to Solid Catalysts:**
Solid catalysts are substances that increase the rate of a chemical reaction without being consumed in the process. They play a crucial role in various industrial processes and reactions.

2. **Feature 1: Activity of Solid Catalysts**
- **Definition:** The activity of a solid catalyst refers to its ability to increase the rate of a reaction. A more active catalyst will facilitate the reaction more efficiently.
- **Example:** Consider the formation of water (H2O) from hydrogen (H2) and oxygen (O2) gases. When a platinum catalyst is introduced, it significantly accelerates the reaction, allowing H2 and O2 to combine and form liquid water. This demonstrates the high activity of platinum as a catalyst.
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