The catalyst used in the manufactures of polythene by Ziegler-Natta method is:

Options

A. Titanium tetrachoride and triphenyl aluminium
B. Titanium tetrachloride and triethyl aluminium
C. Titanium dioxide
D. Titanium isoperoxide

Answer

To solve the question regarding the catalyst used in the manufacture of polythene by the Ziegler-Natta method, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Ziegler-Natta Method**:
The Ziegler-Natta method is a widely used process for the production of polymers, particularly polyethylene (polythene). It utilizes specific catalysts to facilitate the polymerization of ethylene.

2. **Identify the Catalyst**:
The Ziegler-Natta catalyst is a combination of two components: titanium tetrachloride (TiCl4) and a trialkylaluminium compound. The most common trialkylaluminium used is triethylaluminium (C2H5)3Al.

3. **Write the Chemical Names**:
- Titanium tetrachloride (TiCl4) is a metal halide that acts as a Lewis acid.
- Triethylaluminium (C2H5)3Al is an organoaluminium compound that acts as a Lewis base.

4. **Conclusion**:
The combination of these two compounds (TiCl4 and (C2H5)3Al) forms the Ziegler-Natta catalyst, which is essential for the polymerization process in the manufacture of polythene.

5. **Select the Correct Option**:
Based on the information gathered, the correct answer to the question is the combination of titanium tetrachloride and triethylaluminium.

### Final Answer:
The catalyst used in the manufacture of polythene by the Ziegler-Natta method is titanium tetrachloride and triethylaluminium.

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