Ziegker-Natta catalyst, used as a catalyst for the low temperature polmerisation al alkene is an example of_________catalysis and is represented as_______ .

Answer

**Step-by-Step Solution:**

1. **Identify the Catalyst**: The Ziegler-Natta catalyst is used for the polymerization of alkenes, particularly at low temperatures.

2. **Chemical Representation**: The Ziegler-Natta catalyst can be represented by two main chemical formulas:
- Titanium tetrachloride (TiCl4) combined with triethylaluminum (Al(C2H5)3).
- Alternatively, it can also be represented as titanium trichloride (TiCl3) combined with diethylaluminum chloride (Al(C2H5)2Cl).

3. **Type of Catalysis**: The Ziegler-Natta catalyst is an example of **heterogeneous catalysis**. This is characterized by the catalyst and the reactants being in different phases (e.g., solid catalyst and liquid reactants).

4. **Application**: The Ziegler-Natta catalyst is primarily used for the polymerization of ethylene to produce polyethylene, which can be either low-density polyethylene (LDPE) or high-density polyethylene (HDPE).

5. **Final Answer**: Therefore, the Ziegler-Natta catalyst is an example of **heterogeneous catalysis** and is represented as **TiCl4/Al(C2H5)3** or **TiCl3/Al(C2H5)2Cl**.

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