Question:
Ziegler-Natta catalyst is used in the manufacture of high density polyethene. It contains (C$_2$H$_5$)$_3$Al and chloride of a transition metal 'X'. What is 'X'?
Ziegler-Natta catalyst is used in the manufacture of high density polyethene. It contains (C$_2$H$_5$)$_3$Al and chloride of a transition metal 'X'. What is 'X'?
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Ziegler–Natta catalyst = Al(C$_2$H$_5$)$_3$ + TiCl$_4$
Used for HDPE production via coordination polymerization.
Updated On: Jun 12, 2026
- Mn
- Zr
- Ni
- Ti
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The Correct Option is D
Solution and Explanation
Concept:
This question asks for the elemental composition of the Ziegler–Natta catalyst.
• Co-catalyst: Triethylaluminium, (C$_2$H$_5$)$_3$Al
• Transition metal chloride: Titanium chloride (TiCl$_4$ TiCl$_3$)
Step 1: Ziegler–Natta system components The classical catalyst system is:
• (C$_2$H$_5$)$_3$Al (organometallic activator)
• TiCl$_4$ (transition metal chloride)
Step 2: Identification of 'X' Since the transition metal chloride used is titanium chloride, we conclude: \[ X = \text{Ti} \]
Step 3: Conclusion Thus, the correct answer is Titanium (Ti).
• Co-catalyst: Triethylaluminium, (C$_2$H$_5$)$_3$Al
• Transition metal chloride: Titanium chloride (TiCl$_4$ TiCl$_3$)
Step 1: Ziegler–Natta system components The classical catalyst system is:
• (C$_2$H$_5$)$_3$Al (organometallic activator)
• TiCl$_4$ (transition metal chloride)
Step 2: Identification of 'X' Since the transition metal chloride used is titanium chloride, we conclude: \[ X = \text{Ti} \]
Step 3: Conclusion Thus, the correct answer is Titanium (Ti).
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