Ques 1.A lady went to the market to buy a blanket. The shopkeeper showed her blankets made of acrylic fibres as well as made of wool. She preferred to buy an acrylic blanket. Can you guess why? Explain your answer.
Ques 2. Rohit took with him some nylon ropes, when he was going for rock climbing. Can you tell why he selected nylon ropes instead of ropes made of cotton or jute?
Ques 3. Natural Wool is attacked by moths whereas acrylic wool do not. Why ?
Ques 4. Why do we wear cotton clothes in summer?
Ques 5. Burning of plastics cause pollution. Comment.
Ques 6. A synthetic fiber which looks like silk is obtained by chemical treatment of wood pulp. It is, therefore, known as artificial silk. What is its common name? Give its 2 properties.
please tell the above question's answer
Answers
Answer:
acrylic is arifical wool which keeps warm more than wool.nylon rope is strong as steel so he preffred it.acriylic wool is made up of chemical so insect do not attack the acriylic.cotton will allow air to pass theough it.burning of plastic cause pollution because it realese carbomonoxide.
Answer:
Q1. She bought acrylic blanket because it would provide warmth, last long and also doesn't get compressed with use like wool.
Q2. Rohit took nylon ropes because they won't give any problem if wet or heated by sun.
While Cotton or jute can break in pieces.
Q3. Acrylic wool is not attacked because it doesn't have the components that moths want to get from those as it is not natural fiber.
Q4. We wear Cotton clothes in summer because the absorbs most of the sweat from our body also make us feel cool.
Q5. Plastic contains many toxic materials in its composition thus when burnt those toxins are exposed to the environmental air which is very harmful for our lungs.
Q6. Common name of artificial silk is art silk.
Two properties are:-
- They are cheaper.
- They also last longer than silk
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