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- 1. Multiple Choice
Activity - To compare the strengths of given Fibres
Observation - The threads of the given fibre broke at the following weights:
12 cm thread of Cotton - 2.5 gm
13 cm thread of Silk - 3.7 gm
12.5 cm thread of Nylon - 7.8 gm
16 cm thread of Polyester - 6.5 gm
10 cm thread of Wool - 2.1 gm
What can you conclude?
All have varying level of strengths
Strength of : Nylon> Polyester> Silk> Cotton> Wool
Strength of : Wool< Cotton< Silk< Polyester< Nylon
No conclusion can be made
- 2. Multiple Choice
Find the Odd one out of the following materials:
A. Nylon
B. Terylene
C. Wool
D. Acrylic
E. Rayon
Only E
Both A & C
A, D & C
Only C
- 3. Multiple Choice
______________ synthetic fibres contain large number of ester groups.
Polyester
Terylene
Rayon
Nylon
- 4. Multiple Choice
Select the correct option from the given statements.
Polymers cannot form fibres
Polymers can be both natural and synthetic
Polymer is a natural substance
Polymer is a synthetic substance
- 5. Multiple Choice
Which type of Plastic is this?
Thermoplastic
Thermosetting plastic
- 6. Multiple Choice
Plastics reacts with water and air
True
False
- 7. Multiple Choice
1. Identify the product based on the given features.
I. It is a man-made product.
II. It has a cross link arrangement of monomer units.
III. It is used for making goods like wire coverings, switch boards, laptops, etc.
Lycra
Rayon
Thermosetting plastics
Thermoplastics
- 8. Multiple Choice
Paheli Is Taking Preparation For Her Final Examination. She Is Writing Some Statements About “Nylon” But She Confused To Know Whether The Statements Are Correct Or Not? Would You Help Her?
Nylon is the first fully synthetic fibre.
Nylon is made up of the repeating units of amide chemical.
Nylon is a thermosetting polymer.
Nylon fibres absorb very little water.
- 9. Multiple Choice
Mention the type of polymer.
linear
natural
cross linked
synthetic
- 10. Multiple Choice
This arrangement is specific in
bakelite
polythene
PVC
Water bottle plastic
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