Which of the following method is used for obtaining silk fibres from cocoon?

A pile of cocoon is kept under sun

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A pile of cocoon is boiled in water

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A pile of cocoon is exposed to steam

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All the above

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Solution

The correct option is D
All the above

A pile of cocoons is used for obtaining silk fibres. The cocoons are kept under the sun or boiled or exposed to steam.

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Question 19

Steps for the production of silk are given below in a jumbled order. Arrange them in their proper sequence.

(a) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.
(b) Fibres are taken out from the cocoon.
(c) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.
(d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.
(e) Female silk moths lay eggs.
(f) Cocoons are kept under the sun or boiled in water.

Q. Silk fibre is obtained from the cocoons by the process of _________.

Choose the correct order of the steps with respect to silkworm rearing.

I. Eggs are incubated under controlled conditions

II. Silk cocoons are boiled

III. Silk fibres are extracted

IV. Egg hatch into larvae

V. Larvae weave a cocoon around themselves

VI. Larvae feed on mulberry leaves

Q. During the processing of silk fibres, the cocoons are boiled to kill the larvae.

Q. Hot water helps in separating out the silk fibres from cocoons.

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Which of the following method is used for obtaining silk fibres from cocoon?

The correct option is D All the aboveA pile of cocoons is used for obtaining silk fibres. The cocoons are kept under the sun or boiled or exposed to steam.

The correct option is D
All the above

A pile of cocoons is used for obtaining silk fibres. The cocoons are kept under the sun or boiled or exposed to steam.