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In Zeigler-Natta polymerisation of ethyl...

In Zeigler-Natta polymerisation of ethylene, the active species is

A

`AlCl_(3)`

B

`Et_(3) Al`

C

`CH_(2)CH_(2)`

D

`Ti^(3+)`

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The correct Answer is:
D
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MARVEL PUBLICATION-SURFACE CHEMISTRY-MULTIPLE CHOICE QUESTIONS - HIGHER LEVEL
  1. In the case of auto catalysis

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  2. Which of the following statement about the catalyst is/are true?

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  3. In Zeigler-Natta polymerisation of ethylene, the active species is

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  4. Which of the following is less than zero during adsorption?

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  5. Adsorption is the tendency of accumulation of molecular species at the...

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  6. Adsorption is accompanied by the evolution of heat. Thus, according to...

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  7. At low pressure, the fraction of the surface covered follows

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  8. At high pressure, the entire surface gets covered by a monomolecular l...

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  9. Which of the following statements is incorrect?

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  10. During adsorption

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  11. which of the following statements is not correct ?

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  12. The isoelectric point of a colloidally dispersed material is the pH va...

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  13. peptization involves :

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  14. Which of the following is not the property of hydrophilic solutions ?

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  15. Which one of the following characteristics is not correct for physical...

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  16. The dispersed phase in colloidal iron (III) hydroxide and collodial go...

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  17. Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.10...

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  18. In the fermentation of sugar, glucose is converted into alcohol and CO...

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  19. The volume of gases H(2), CH(4), CO(2) and NH(3) adsorbed by 1 g of ch...

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  20. Protons accelerate the hydrolysis of esters . This is an example os :

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