Answer the following:
1. Silk fibres are made of _.
2. The process of taking out alk fibres from the cocoons for use as silk is called _.

Academic Chemistry NCERT Class 7

1. Silk fibres are made of Protein.

2. The process of taking out alk fibres from the cocoons for use as silk is called Reeling.

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Updated on: 10-Oct-2022

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Reeling of silk is(a) a process of making silk reels(b) spinning of silk fibres(c) weaving of silk cloth(d) the process of taking silk threads from cocoon
What is the process of producing silk is called?
Fill in the following blanks with suitable words:(a) Synthetic fibres are also called __________ fibres.(b) Synthetic fibres are made from raw materials called __________(c) Like synthetic fibres, plastic is also a _____________(d) The use of plastics can be reduced by using bags made of _____________ or _____________ instead of polythene bags.
Fill in the blanks in the following statements.(a) ______ and ______ fibres are obtained from animals.(b) Silk fibres come from ______ of silk ______ .(c) Wool yielding animals bear ______ on their body.(d) Hair trap a lot of ______ , which is a poor ______ of heat.
Mark the correct answer.Rayon is different from synthetic fibres becauseIt has a silk-like appearance.It is obtained from wood pulp.Its fibres can also be woven like those of natural fibres.
The rearing of silkworms for obtaining silk is called-
How and where silk is made? Explain the different types of silk.
Terrycot is made by mixing two types of fibres. Write the names of the fibres.
Which of the following is not a type of silk?Mulberry silkTassarsilkMooga silk Moth silk
The following is an answer given by Boojho to a question asked by his teacher: Cotton, wool, silk and jute are classified as natural fibres whereas nylon and polyester are classified as synthetic fibres”. Can you tell what question the teacher has asked?
Fill in the blanks:1. Silk and wool are _________ products.2. The world's finest wool is extracted from _________ sheep.3. During the process of shearing _________ is removed.4. Silk is known as _________.5. _________ hatches from the egg of Moth.
Fill in the blanks with appropriate words.Synthetic fibres are also called ……….. or ……….Synthetic fibres are synthesised from raw material called …………Like synthetic fibres, plastic is also a …………..
Fill in the blanks with appropriate words.(a) Synthetic fibres are also called ____ or ____ fibres.(b) Synthetic fibres are synthesised from a raw material called _____(c) Like synthetic fibres, plastic is also a _____
Arrange the following fibres in the order of increasing strength (keeping the fibre of least strength first): Nylon, Cotton, Wool, Polyester, Silk
Which set of substances is not used for making fibres?Silk, chemicalsYak hair, camel hairHusk, bonesFlax, wool

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