What Do You Know About Polymer Engineering?

2.

Which of these is cellulose a polymer of?

Glucose
Fructose
Lactose
Sucrose

Correct Answer

A. Glucose

Explanation

Cellulose is a polymer of glucose. It is a complex carbohydrate found in the cell walls of plants and is the most abundant organic compound on Earth. Cellulose molecules are composed of many glucose units linked together through glycosidic bonds. The arrangement of these glucose units gives cellulose its strong and rigid structure, making it an important component in providing support and shape to plant cells.

Rate this question:

3.

Which catalyst is used for olefin polymerization?

Ziegler-Natta catalyst
Wilkinson catalyst
Raney nickel catalyst
Merrifield resin

Correct Answer

A. Ziegler-Natta catalyst

Explanation

The Ziegler-Natta catalyst is used for olefin polymerization. This catalyst is a combination of a transition metal compound, usually a titanium or vanadium compound, and an organoaluminum compound. It allows for the controlled polymerization of olefins, such as ethylene and propylene, by coordinating with the double bonds in the monomers and facilitating their bonding to form polymer chains. The Ziegler-Natta catalyst is widely used in the production of various polyolefins, including polyethylene and polypropylene, due to its high activity, selectivity, and ability to produce polymers with desired properties.

Rate this question:

4.

Which of these is an example of a co-polymer?

Teflon
Polypropylene
PVC
Buna-S

Correct Answer

A. Buna-S

Explanation

Buna-S is an example of a co-polymer because it is a synthetic rubber made from the polymerization of butadiene and styrene. Co-polymers are formed by the combination of two or more different monomers, resulting in a polymer with unique properties. In the case of Buna-S, the combination of butadiene and styrene creates a rubber material with improved strength, flexibility, and resistance to chemicals and heat.

Rate this question:

5.

Inulin is a polymer of which of these sugars?

Glucose
Arabinose
Galactose
Fructose

Correct Answer

A. Fructose

Explanation

Inulin is a polymer of fructose. Inulin is a type of dietary fiber that is found in many plants, including chicory root, onions, and bananas. It consists of a chain of fructose molecules linked together. In the body, inulin is not digested or absorbed in the small intestine, but instead passes through to the large intestine where it is fermented by bacteria. Inulin has been found to have several health benefits, including promoting gut health and aiding in weight management.

Rate this question:

6.

Which of these is a chain transfer reagent?

CH4
CCl4
H2
O2

Correct Answer

A. CCl4

Explanation

CCl4 is a chain transfer reagent because it can break the chain reaction in a polymerization process by transferring a hydrogen atom to the growing polymer chain. This results in the formation of a free radical on the CCl3 group, which is highly stable and does not readily react further. The use of CCl4 as a chain transfer agent helps control the molecular weight and properties of the polymer being formed.

Rate this question:

7.

Which of these reactions produces Bakelite?

Aniline and urea
Phenol and methanal
Phenol and chloroform
Formaldehyde and NaOH

Correct Answer

A. Phenol and methanal

Explanation

Phenol and methanal react to produce Bakelite. Bakelite is a type of thermosetting plastic that was first synthesized by Leo Baekeland in 1907. It is formed through a condensation reaction between phenol and formaldehyde (which is also known as methanal). This reaction results in the formation of a three-dimensional network of cross-linked polymers, giving Bakelite its unique properties such as heat resistance and electrical insulation.

Rate this question:

8.

What is inulin a type of?

Carbohydrates
Proteins
Lipids
Minerals
Vitamins

Correct Answer

A. Carbohydrates

Explanation

Inulin is a type of carbohydrate. It is a soluble dietary fiber that is found in many plants, particularly in the roots or tubers. It is not a protein, lipid, mineral, or vitamin. Inulin is commonly used as a prebiotic, as it promotes the growth of beneficial bacteria in the gut.

Rate this question:

9.

Which of these describes a glass?

Polymeric mixture
Lez gel
Micro-crystalline
Super cooled liquid
Fluid

Correct Answer

A. Super cooled liquid

Explanation

A glass is considered a super cooled liquid because it has a non-crystalline structure and behaves as a solid, but its molecules are arranged in a disordered manner similar to that of a liquid. This is due to the rapid cooling process during its formation, which does not allow enough time for the molecules to arrange themselves in a crystalline structure. Therefore, a glass is technically not a solid or a liquid, but rather a super cooled liquid.

Rate this question:

10.

Which of these is a condensation polymer?

PVC
Polythene
Protein
Rubber

Correct Answer

A. Protein

Explanation

Protein is a condensation polymer because it is formed by the condensation reaction between amino acids. In this reaction, the carboxyl group of one amino acid combines with the amino group of another, releasing a molecule of water. This process repeats multiple times to form long chains of amino acids, which make up proteins. PVC, polythene, and rubber are not condensation polymers as they are formed through different polymerization processes.

Rate this question:

What Do You Know About Polymer Engineering?

Which of these polymers occurs naturally?

Quiz Preview

Which of these is cellulose a polymer of?

Which catalyst is used for olefin polymerization?

Which of these is an example of a co-polymer?

Inulin is a polymer of which of these sugars?

Which of these is a chain transfer reagent?

Which of these reactions produces Bakelite?

What is inulin a type of?

Which of these describes a glass?

Which of these is a condensation polymer?