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Subjects
Science State Board
Class 7
Polymer Chemistry
Introduction to polymers
6.
Answer the questions about rayon, silk and synthetic fibres
Exercise condition:
4
m.
Choose the correct answer:
1
.
The cultivation of silkworms for silk production is known as __________.
Sericulture
floriculture
horticulture
Apiculture
2
.
Once the cocoon is formed, the larva is killed by exposing it to hot air or steam at the _________ stage.
None of these
Chrysalis
Egg
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