Mark the correct solution. Rayon is different from synthetic fibres because
(a) It has a silk-like appearance.
(b) It is obtained from wood pulp.
(c) Its fibres can also be woven like those of natural fibres.
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In a group of 70 people, 37 like coffee, 52 like tea, and each person likes at least one of the two drinks. How many people like both coffee and tea?
Let C denote the set of people who like coffee, and T denote the set of people who like tea n(C ∪ T) = 70, n(C) = 37, n(T) = 52 We...
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In a group of 65 people, 40 like cricket, 10 like both cricket and tennis. How many like tennis only and not cricket? How many like tennis?
Let C denote the set of people who like cricket, and T denote the set of people who like tennis ∴ n(C ∪ T) = 65, n(C) = 40, n(C ∩...
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Explain why some fibres are called synthetic.
There are some fibres that are prepared by man by using chemicals. These are called synthetic fibres. These are made of small units that join together to form long chains....
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Fill in the blanks with appropriate words. (a) Synthetic fibres are also called ________or _________fibres.
(a) Synthetic fibres are also called artificial or man-made fibres. (b) Synthetic fibres are synthesized from raw materials called petrochemicals. (c) Like synthetic fibres, plastic is also a polymer.
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Manufacturing synthetic fibres is actually helping conservation of forests'. Comment.
The natural fibers are obtained from plants and animals, whereas the synthetic fibers are obtained by chemical processing of petrochemicals. Unlike natural fibers, manufacturing of synthetic fibers do not require...
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Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute
Natural Fibres : wool, cotton, silk, jute Synthetic Fibres : nylon, polyester
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Fill in the blanks: a) Plant fibres are obtained from_________ and ________ . b) Animals fibres are __________ and ___________ .
a) Plant fibres are obtained from jute and cotton. b) Animals fibres are silk and wool
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In a group of 70 people, 37 like coffee, 52 like tea, and each person likes at least one of the two drinks. How many people like both coffee and tea
Let C denote the set of people who like coffee, and T denote the set of people who like tea n(C ∪ T) = 70, n(C) = 37, n(T) = 52...
1 Answers 1 views
In a group of 65 people, 40 like cricket, 10 like both cricket and tennis. How many like tennis only and not cricket? How many like tennis
Let C denote the set of people who like cricket, and T denote the set of people who like tennis ∴ n(C ∪ T) = 65, n(C) = 40, n(C ∩...
1 Answers 1 views
Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because:
b. Nodes have meristematic cells
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