Silk

Q.

The process of making silk from silkworm is known as ______.

1. Sericulture

2. Epiculture

3. Horticulture

4. Pisciculture

Q.

The cultivation of silkworms to produce silk is known as ______.

1. Sericulture

2. Epiculture

3. Horticulture

4. Pisciculture

Q. Around 10 kg of silkworm cocoons are needed to produce 1 kg of silk.

1. True
2. False

Q.

Where do we get silk fiber from?

Q. The practice of breeding silkworms for the production of raw silk is known as:

1. Agriculture
2. Sericulture
3. Horticulture
4. Vermiculture

Q.

The ratio of cocoon to silk obtained by sericulture is

1. 10:1

2. 5:1

3. 20:1

4. 2:1

Q.

The advantage of acrylic over other fabrics is_____.

1. Has good elasticity, and is a good conductor of electricity

2. Water proof, good conductor of electricty and great elasticity

3. Excellent resistance to sunlight and water proof

4. Resistance to shrinkage, sunlight and great elasticity

Q. Artificial silk is made from ________.

1. cellulose
2. PVC
3. polyester
4. PET

Q. Which of the following fibres is also called artificial silk?

1. Acrylic
2. Rayon
3. Nylon
4. Polyester

Q.

The term sericulture is for

1. Culture of bacteria

2. Rearing of the Silkworm

3. Making silk fabric from silk yarn

4. production of sarees

Q. Name the fiber made by blending terylene with wool.

1. Terrycot
2. None of the above
3. Terrywool
4. Rayon

Q. Silk was first discovered in

1. India
2. China
3. Russia
4. Mongolia

Q.

Select the correct option from the following statements about the physical properties of silk.

1. Silk rope is stronger than metal wire of any dimension

2. Silk rope is stronger than metal wire of similar dimension

3. Silk rope is heavier than metal wire of similar dimension
4. Silk rope is stiffer than metal wire of similar dimension

Q. A synthetic fibre which looks like silk is obtained by chemical treatment of wood pulp. It is, therefore, known as artificial silk. What is its common name?

Q. is a type of silkworm which produces the finest quality silk.

1. Tasar
2. Bombyx moreh
3. Bombyx mori

Q. Terrycot is made by mixing two types of fibres. Write the names of the fibres.​

Q.

Statement 1: Polyester can be blended with cotton to obtain polycot.​

​Statement 2: Cotton wrinkles but the blended fabric polycot, does not wrinkle.​

1. Statement 1 is correct, but statement 2 is incorrect.​
2. Both the statements are incorrect. ​
3. Statement 1 is incorrect, but statement 2 is correct.​
4. Both the statements are correct. ​

Q.

Rayon is different from truly synthetic fibre because

1. it can be dyed in wide variety of colours.

2. it has a silk-like appearance.

3. its fibres can be woven like those of natural fibres.

4. it is obtained by chemical synthesis of cellulose.

Q. Pick out the correct option to complete the given analogy. Artificial wool: Acrylic : : Artificial silk:_________​

1. Rayon
2. Nylon
3. Terylene
4. Polyester

Q. Write the monomer of polyester and mention the uses of this fibre.

Q. Compare the given fibres based on the properties mentioned below.​

Q. Why is rayon not considered a fully synthetic fibre?

Q. Rey grouped few polymers on the basis of some common property as follows:
Group I: Rayon, acrylic, nylon, jute
Group II: PVC, melamine, Teflon
Group III: Polycot, terry wool, acrylic
Choose the odd one out in group I, II and III

1. I: Nylon, II: Teflon, III: Acrylic
2. I: Jute, II: Melamine, III: Terry wool
3. I: Rayon, II: Teflon, III: Terry wool
4. I: Jute, II: Melamine, III: Acrylic

Q. Acrylic is made from the combination of

1. Coal, air, water, oil and limestone
2. None of these
3. Air, water, oil and limestone
4. Coal, air and water

Q. Artificial silk is made from ________.

1. PVC
2. polyester
3. cellulose
4. PET

Q. Rayon is prepared by the:

1. Chemical treatment of silk fibres
2. Chemical treatment of wood pulp
3. Boiling of cocoons of silkworms
4. Heating of limestone

Q. Refer to the descriptions given below and identify the fibres X , Y, and Z. ​

X: It does not get wrinkled easily, remains crisp and is easy to wash.​

Y: It was the first fully synthetic fibre.​

Z: It is a man-made fibre prepared by chemical treatment of wood pulp.​

1. X: Polyester; Y: Nylon; Z: Rayon​
2. X: Nylon; Y: Wool; Z: Rayon​
3. X: Polyester; Y: Cotton; Z: Acrylic​
4. X: Rayon; Y: Nylon; Z: Acrylic​

Q. The advantage of acrylic over wool is that it _____.

1. has resistance to shrinkage and great elasticity
2. wrinkles very easily
3. dries quickly
4. is cheaper and warmer

Q. Artificial silk is made from ________.

1. cellulose
2. PET
3. PVC
4. polyester

Q.

Which of the following fibres are correctly matched with their properties?​

1. Rayon : Wrinkle-resistant​

2. Acrylic : Shrinkage-resistant​

3. Polyester : High moisture absorption​

4. Nylon : High strength​

1. 2 and 4​
2. 2 and 3​
3. 3 and 4​
4. 1 and 3​