Explain why some fibres are called synthetic.
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Why are some substances biodegradable and some non-biodegradable?
Some substances which are degraded and broken down into simpler substances by the microorganisms, are called biodegradable substances. For example: Cotton, wood, paper, wool, etc. Substance (mainly man-made) that do...
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In some animal groups, the body is found divided into compartments with at least some organs. This characteristic feature is called:
Correct Answer is (B) Metamerism In some animals, the body is externally and internally divided into segments with a serial repetition of at least some organs. For example, in earthworm, the body...
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Mark the correct solution. Rayon is different from synthetic fibres because (a) It has a silk-like appearance.
Rayon is different from synthetic fibres because: (b) It is obtained from wood pulp.
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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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Explain Synthetic division method of polynomial division.
Synthetic division is a shortcut method for dividing a polynomial by a simple divisor of the form (x - n). The divisor must be of that form in order for synthetic division to...
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Why synthetic detergents are preferred over soaps for use in washing machines ?
[Hint : They work well even with hard water and not form any scum.]
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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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You read about different kinds of shelters in Jammu and Kashmir – some on high mountains, some on water, some with beautiful
The shelters of the people living on the mountains of Jammu and Kashmir are basically in the form of a tent called Rebo. These can be packed up and carried...
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