Question

1.Very Short Answer Type Questions
(a) Define the following terms:

(0)
Shearing
(ii) Scouring
(iii) Reeling
(iv) Sericulture
(v) Bleaching
(vi) Degumming
(vii) Fleece



I need it in very short answer ​

Answer 1

☆ Shearing :- It is the process of cutting something with shears, such as animal fur. It is done so by a tool with a long edge, and is sometimes also a reference to a metal cutting tool.

☆ Scouring :- The process of washing or cleaning of sheered skin in huge tanks with chemical solution to remove oil,greece,dust and soil particals is known as scouring

☆ Reeling :- It is a term used in silk culture. It involves undoing the thread or silk fibre from around the cocoon. It has to done with extreme care so that the fibre does not get entangled or broken

☆ Sericulture :- The rearing of silkworms

to obtain silk is known as sericulture.

During a stage of its life cycle, the

silkworm weaves a net around itself. Silk

is then obtained from this net. 

 

☆ Bleaching :- It is simply the process of decolourising of coloured substances. it can be done via oxidation or reduction.

☆ Degumming :- The removal of gum from a material, especially the removal of sericin from silk or phospholipids etc. from vegetable oils.

☆ Fleece :- The woolly covering of a sheep or goat.A woollen coat of a domestic sheep or long-haired goat is called fleece. Simply, the hair of a sheep,long-haired goat, long-haired camel,etc. which is used as a fabric is called fleece.

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Answer 2

$\red{Shearing}$

Shearing, also known as die cutting, is a process which cuts stock without the formation of chips or the use of burning or melting. Strictly speaking, if the cutting blades are straight the process is called shearing; if the cutting blades are curved then they are shearing-type operations.

$\blue{Scouring}$

The process in which the removal of dirt and unwanted impurities is done is called scouring.Scouring is done by washing and rubbing the hairs by the detergent and soap, so that all the impurities are gone by getting dissolved in water and by forming a micelle with soap.

$\pink{Reeling}$

Reeling is the process of unwinding raw silk filament from the cocoon directly onto a holder. When several filament strands, either raw silk or synthetic, are combined and twisted together, producing yarn of a specified thickness, the process is called throwing.

$\green{Sericulture,}$

Sericulture, or silk farming, is the cultivation of silkworms to produce silk. Although there are several commercial species of silkworms, Bombyx mori (the caterpillar of the domestic silkmoth) is the most widely used and intensively studied silkworm.

${Bleaching}$

Bleaching process involves decolourization of the coloured materials. The nascent oxygen is responsible for the bleaching nature of chlorine in presence of water as moisture. Nascent oxygen suggests the oxygen formed during the course of the reaction which is very unstable.

$\red{Degumming}$

Degumming is a process for removal of phosphatides from crude soybean and other vegetable oils to improve physical stability and facilitate further processing. the phosphatides are also called gums and lecithin.

$\pink{Fleece}$

The hair covering the body of wool yielding animals such as sheep, yak, goat, etc. Reeling-The process of taking out threads from the cocoon for use as silk is called reeling the silk.