What will happen if cocoon is not boiled Class 7?
The cocoons have to be boiled to loosen the fibre to be able to reel it. If cocoons are not boiled then the fine thread of silk will not be obtained and also the cocoons will be brittle in nature.
What will happen if cooking is not boiled?
Answer. silkworm cocoons are placed in boiling water to make the one long continuous thread separate if cocoons are not boiled then they will be brittle in nature.
Why do they have to boil the cocoon?
During boiling, some amount of water enters the cocoon cavity and makes it soft. This helps in separating the fibres from cocoon during the reeling process. … Due to hot water, pupa dies and does not emerge out of cocoon.
What will happen if cocoon of silkworm is not boiled in hot water?
silkworm cocoons are placed in boiling water to make the one long continuous thread separate if cocoons are not boiled then they will be brittle in nature.
What will happen if phone is not boiled?
Without boiling cocoon, the strands would be brittle which breaks them into smaller pieces and would make it difficult to spin threads out of the cocoon.
Why should Rice not be boiled too vigorously?
“NEVER stir your rice! Stirring activates starch and will make your rice gloppy. … If you cook rice too quickly, the water will evaporate and the rice will be undercooked. Low heat keeps kernels intact.”
Why are cocoons boiled in hot water or treated in oven?
Boiling with hot water or treating in ovens results in softening of the upper layer of of the cocoon or killing the pupa inside. … If not killed, pupa will turn to moth which will cut open the cocoon and come out and we will not able to get continuous threads.
Can you get silk without killing the worm?
Ahimsa Silk, also known as peace silk, cruelty-free silk and non-violent silk, refers to any type of silk that is produced without harming or killing the silk worms. … This is in contrast to conventional silk, whereby cocoons are steamed, boiled, or dried in the sun, killing the silk larvae inside.
Why silkworms are killed by placing the cocoons in hot water?
Explanation: Because there is a worm inside the cocoon so that’s why it is boil to kill it . … When the silkworms are still in their cocoons they are boiled out so that they would die inside. … After the silkworm dies it becomes easier to unwrap the silk threads.
Why are the silk cocoons boiled give two reasons?
To get the silk from the cocoons at the optimum time, before the worm makes a hole in the cocoon reducing it’s value, they are placed in boiling water to kill the worm and make it easier to unwrap the silk threads.