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Transition and Inner Transition Elements — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12ChemistryTransition and Inner Transition Elements1 Mark
Question
…………. catalyst is used in polymerization of propylene.
✓

Answer

Zeigler - Natta (or) $TiCl _4+ Al \left( C _2 H _5\right)_3$

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