Synthetic Fibres and Plastics [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 7 of 21
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Question 1
Question MCQ▾
Plastics are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Biodegradable | |
b. | Non-biodegradable | |
c. | All of the above | |
d. | None of the above |
Question 2
Question MCQ▾
Rayon is called regenerated fibre because:
Choices
Choice (4) | Response | |
---|---|---|
a. | its formation is a case of purification of cellulose | |
b. | of the blending property of rayon | |
c. | its formation is the case of synthesis of cellulose | |
d. | of its shining softness and absorbing properties |
Question 3
Question MCQ▾
Name one versatile material
Choices
Choice (4) | Response | |
---|---|---|
a. | Only a | |
b. | a and b | |
c. | Melamine | |
d. | Bakelite |
Question 4
Question MCQ▾
Examples of thermoplastic material are
Choices
Choice (4) | Response | |
---|---|---|
a. | Nylon, Polythene | |
b. | PVC, PTFE | |
c. | Bakelite | |
d. | Both a. and b. are correct |
Question 5
Question MCQ▾
Blending property of polyesters is used in the formation of:
Choices
Choice (4) | Response | |
---|---|---|
a. | For making sarees. | |
b. | Mixed with wool to make long lasting fabrics | |
c. | Aprons and caps | |
d. | Terrycot, Terrywool, Terrysilk etc. |
Question 6
Question MCQ▾
Plastic is
Choices
Choice (4) | Response | |
---|---|---|
a. | Strong | |
b. | Light | |
c. | Durable | |
d. | All a., b. and c. are correct |
Question 7
Question MCQ▾
Fibres obtained from plants and animals are called
Choices
Choice (4) | Response | |
---|---|---|
a. | Natural Fibres | |
b. | Cellulose | |
c. | Man-made Fibres | |
d. | Synthetic Fibres |