1. Pick the synthetic fibre out of the following?
(a) Cotton (c) Jute
(b) Nylon (d) Wool
2. Which of the following is a source of rayon?
(a) Wool (c) Wood pulp
(b) PET (d) Silk
3. Polycot is obtained by mixing
(a) nylon and wool (c) nylon and cotton
(b) polyester and wool (d) polyester and cotton
4. Which is a thermosetting plastic?
(a) Melamine (c) PVC
(b) Polythene (d) Nylon
5. The material similar to silk in appearance is
(a) Nylon (c) Polyester
(b) Rayon (d) Terylene
6. The most suitable material for the preparation of handles of
cooking utensils is
(a) Polythene (c) Nylon
(b) PVC (d) Bakelite
7. Which of the following is not a common property of plastics?
(a) Non-reactive (c) Durable
(b) Light in weight (d) Good conductor of electricity
8. Which of the following represents the correct match for items in
Column A with those in Column B.
Column A. Column B
I. Nylon (i) Thermoplastic
II. PVC. (ii)Thermo.
III. Bakelite (iii) Fibre
(a) I-(ii), II-(iii), III-(i) (c) I-(ii), II-(i), III-(iii)
(b) I-(iii), II-(i), III-(ii) (d) I-(iii), II-(ii), III-(i)
9. Which of the following groups contain all synthetic substances?
(a) Nylon, Terylene, Wool (c) PVC, Polythene, Bakelite
(b) Cotton, Polycot, Rayon (d) Acrylic, Silk, Wool
10. The material which is commonly used for making kitchen
containers is
(a) PVC (c) Teflon
(b) Acrylic (d) PET
Answers
Answer:
1. b
2. d
3. d
4. a
5. b
6. d
7. d
8. b
9. c
10. d
Plz Mark me as BRAINLIEST
Answers:
1) b) Nylon
Exp. Nylon is a synthetic fibre that was invented in the early 1900s. They are used to make cloth materials as well as ropes, nets etc.
2) c) Wood pulp
Exp. Rayon, which is a semi-synthetic fibre is mainly produced from wood pulp. Rayon is also called artificial silk.
3) d) Polyester and cotton
Exp. Polycot is the mixture of polyester and cotton. It is used to make highly durable clothes.
4) a) Melamine
Exp. Melamine is the thermosetting plastic among the given options. Thermosetting plastics are those plastics that cannot be remolded by heating after once set.
5) b) Rayon
Exp. Rayon is the artificial fibre that has characteristics and properties similar to that of silk. Due to the similarities, rayon is also called artificial wool.
6) d) Bakelite
Exp. Bakelite is plastic that is an insulator of heat. So, when they are kept as handles of pans and utensils, they will not conduct any heat and hence can be used easily.
7) d) Good conductor of electricity
Exp. Plastic is a poor conductor of electricity. Hence the correct and required option is D.
8) b) I-(iii), II-(i), III-(ii)
Exp. Nylon is a synthetic fibre, PVC is a thermoplastic and Bakelite is a thermosetting plastic. Hence the required option is B.
9) c) PVC, Polythene, Bakelite
Exp. PVC, polythene and Bakelite are all synthetic substances made artificially in laboratories.
10) d) PET
Exp. PET, also called polyethene terephthalate is a strong plastic that is used to make storage containers for kitchen purposes. They are much preferred over glass jars as they are much durable.