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Poselype:
True or False Type:
1. Acrylic fibres burns with a sooty flame and shrinks to form black beads.
2. Polyester fibres are used for making hand knit sweaters.
3. Wool is a natural fibre obtained from plants.
Right or Wrong Type:
1. Plastics are man-made materials.
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Similar Questions
Q1
Are these statements true or false? Rewrite the false ones correctly.
(a) Polymers are small molecules made by stringing together several monomers.
(b) Blended fabrics contain only synthetic fibres.
(c) Dusters made of nylon or other synthetic materials are good for use in the kitchen.
(d) Polyester fibres are obtained from petroleum products.
(e) Terylene, a synthetic fibre, can be used instead of wool.
(f) Rayon, which is obtained from cellulose, is a natural fibre.
(a) Polymers are small molecules made by stringing together several monomers.
(b) Blended fabrics contain only synthetic fibres.
(c) Dusters made of nylon or other synthetic materials are good for use in the kitchen.
(d) Polyester fibres are obtained from petroleum products.
(e) Terylene, a synthetic fibre, can be used instead of wool.
(f) Rayon, which is obtained from cellulose, is a natural fibre.
View Solution
Q2
Read the statements and select the option that correctly identifies them as true (T) and false (F).
1. Most synthetic fibres are obtained from coal, petroleum, and natural gas.
2. Acrylic fibre closely resembles wool.
3. Most synthetic fibres have very high moisture absorbing capacity.
4. Polyester is prepared from cellulose.
1. Most synthetic fibres are obtained from coal, petroleum, and natural gas.
2. Acrylic fibre closely resembles wool.
3. Most synthetic fibres have very high moisture absorbing capacity.
4. Polyester is prepared from cellulose.
| 1 | 2 | 3 | 4 | |
| A | T | F | F | T |
| B | T | T | T | F |
| C | T | T | F | F |
| D | F | T | T | F |
View Solution
Q3
State whether the following statements are true or false:
(a) Silk fibre is obtained from the stem of a plant.
(b) Polyester is a natural fibre.
[2 marks]
[NCERT Q.2(vi)-(vii)]
[Natural fibres]
(a) Silk fibre is obtained from the stem of a plant.
(b) Polyester is a natural fibre.
[2 marks]
[NCERT Q.2(vi)-(vii)]
[Natural fibres]
View Solution
Q4
Polythene, polystyrene, nylon, PVC, rayon, terene, acrylic, formica, polycot, melamine
The list of materials mentioned above can be classified as
(a) synthetic fibres and plastics.
(b) polyester fibres and objects made of glass.
(c) man-made materials and plastics.
(d) synthetic fibres and thermoplastics.
The list of materials mentioned above can be classified as
(a) synthetic fibres and plastics.
(b) polyester fibres and objects made of glass.
(c) man-made materials and plastics.
(d) synthetic fibres and thermoplastics.
View Solution
Q5
State whether the sentences are true or false. Correct and rewrite the wrong sentences.
(a) Fibres are made from yarns.
(b) All fibres are made of cotton wool.
(c) Cotton is obtained from the stem of the cotton plant.
(d) Spinning is a process of making yarn from fibres.
(e) The separation of cotton fibres from the seeds is known as carding.
(f) Weaving and knitting are two ways of changing yarn to fabric.
(g) A takli is used to weave fabric.
(h) Jute grows well in a hot, damp climate.
(i) Silk is obtained from an insect.
(j) Nylon is a natural fibre.
(a) Fibres are made from yarns.
(b) All fibres are made of cotton wool.
(c) Cotton is obtained from the stem of the cotton plant.
(d) Spinning is a process of making yarn from fibres.
(e) The separation of cotton fibres from the seeds is known as carding.
(f) Weaving and knitting are two ways of changing yarn to fabric.
(g) A takli is used to weave fabric.
(h) Jute grows well in a hot, damp climate.
(i) Silk is obtained from an insect.
(j) Nylon is a natural fibre.
View Solution