Question

Ziegler-Natta catalyst is used to prepare:
A.) Low-density polythene
B.) Teflon
C.) High density polythene
D.) Nylon$- 6$

Answer 1

Ziegler-Natta is a catalyst which is a mixture of Triethylaluminum(${({C_2}{H_5})_3}Al$) and Titanium tetrachloride ($TiC{l_4}$) . It is basically used to prepare high density polythene or plastics.

Complete step by step answer:
In this question, by viscous material we mean that material which is thick or sticky or adhesive or the materials that do not flow easily. Viscosity of a material depends on intermolecular forces. It also depends on the presence of the hydroxyl group($O{H^ - }$) and on the amount of hydrogen bonding.
Glycerol (propane $1,2,3$triol) has the following structural formula:
$C{H_2} - OH \\\ | \\\ CH - OH \\\ | \\\ C{H_2} - OH \\\$
As we can see, glycerol has three hydroxyl groups attached to each carbon. This helps glycerol to form intramolecular hydrogen bonding in between its molecules. Thus, in glycerol adhesiveness increases so the viscosity is more.
Ethylene glycol (ethane $1,2$diol ) has the following structural formula:
$C{H_2} - OH \\\ | \\\ C{H_2} - OH \\\$
As we can see in ethylene glycol, there are two hydroxyl groups attached on at each carbon of the molecule. There is also the possibility of hydrogen bonding . But the number of hydroxyl groups is less than in case of glycerol so the extent of hydrogen bonding is more for glycerol. Hence, glycerol has higher viscosity than ethylene glycol.

Note:
Remember that if in a molecule there is more hydrogen bonding then the stickiness or adhesiveness increases in that molecule. Therefore, the viscosity of the molecule increases and the molecule will not flow easily.