Natural Macromolecules

Q. What is a polyester?

Q.

Is glass a polymer?

Q.

Explain the terms polymer and monomer.

Q.

Polymers that are found in nature are called______.

Q.

Sulphuric acid is also used in the manufacture of fibers like

1. Rayon

2. Nylon

3. polyester

4. polythene

Q. Which of the following are natural macromolecules?

1. Rubber
2. Silk
3. Starch
4. Elastomer

Q. Which of the following is a natural polymer ?

1. Bakelite
2. Cellulose
3. PVC
4. Neoperene

Q.

Match the column I with column II and mark the appropriate choice.

	Column I		Column II
(A)	Natural polymer	(i)	Rayon
(B)	Addition polymer	(ii)	Bakelite
(C)	Copolymer	(iii)	Silk
(D)	Semi-synthetic polymer	(iv)	Neoprene

1. (A) $\to$ (i), (B) $\to$ (ii), (C) $\to$ (iv), (D) $\to$ (iii)
2. (A) $\to$ (iii), (B) $\to$ (iv), (C) $\to$ (ii), (D) $\to$ (i)
3. (A) $\to$ (ii), (B) $\to$ (iii), (C) $\to$ (i), (D) $\to$ (iv)
4. (A) $\to$ (iv), (B) $\to$ (i), (C) $\to$ (iii), (D) $\to$ (ii)

Q.

What are natural polymers?

Q. Why do fullerenes act as insulators in pure state? Also, what is meant by pure state in the context?

Q. ______ and ______ yields wool found in South America.

1. Goat and Sheep
2. Angora Goat
3. Llama and Alpaca
4. Yak and Sheep

Q. Which of the following is a semisynthetic polymer?

1. Wool
2. Cellulose nitrate
3. Silk
4. Rubber

Q. Which of the following is not an example of natural polymer?

1. Wool
2. Silk
3. Leather
4. Nylon

Q. Which of the following is available in liquid, solid or gas phases as waxes or as rubbers?

1. Silicone polymers
2. Artificical silk
3. Bakelite
4. All

Q. Which of the following properties of rubber are responsible for its wide usage?

1. Water resistance
2. Oxidation resistance
3. High elasticity
4. Good heat conductivity

Q. Which one of the following is a synthetic polymer?

1. Starch
2. Silk
3. Protein
4. Neoprene

Q. Based on molecular forces, what type of polymer is neoprene?

Q.

Which of the following statement is correct regarding the drawbacks of raw rubber [AIIMS 2001]

1. It has little durability

2. It has large water-absorption capacity

3. All of these

4. It is plastic in nature

Q. Cellulose is a natural polymer present in cotton.

1. False
2. True

Q. Which of the following are natural macromolecules?

1. Rubber
2. Silk
3. Starch
4. Elastomer

Q. Among the following, a natural polymer is____________.

1. cellulose
2. polyethylene
3. PVC
4. teflon

Q. Which of the following is not a natural polymer?

1. Proteins
2. Polysaccharides
3. Phenol- formaldehyde
4. Cotton

Q. After the ban on plastic bags, students of a school decided to make the people aware of the harmful effects of plastic bags on the environment and Yamuna river. To make the awareness more impactful, they organized rally by joining hands with other schools and distributed paper bags to vegetable vendors, shopkeepers, and departmental stores. All the students pledge not to use polythene bags in the future to save the Yamuna river.
After reading the above passage, answer the following questions:
(i) What values are shown by the students?
(ii) What are bio-degradable polymers? Give one example.
(iii) Is polythene a condensation or the addition polymer?

Q. The acrylic polymer must contain :

1. acrylonitrile monomer.
2. sodium thiocyanate.
3. acrylic acid.
4. sulphuric acid.

Q. The monomer unit of cellulose is .

1. glucose
2. amino acid
3. isoprene

Q. Cellulose is a polymer of:

1. glucose
2. fructose
3. ribose
4. sucrose

Q. Write a short note on the health problems of a worker in the silk industry.

Q. How is silk obtained from silk worm ? Explain.

Q. Cotton is a natural polymer. What is its chemical name ?

Q. The polymerisation of large no.of chloroethene molecules gives

1. Teflon
2. Chloroethene
3. Ethene
4. Polyvinylchloride