Synthetic fibres & plastics class 8th

Fabrics are made from fibres obtained from (fabrics un fibres se bnti Hein Jo milte hei-)

• Only natural source

• Only artificial source

• Natural or artificial source

• Only man- made source

• Can not say

Which of the following is Synthetic fibre? (Inme se konsa Synthetic fibre hei?)

• Wool

• Cotton

• Rayon

• Silk

• No one

Tags

NGSS.MS-PS1-3

Which of the following in natural Fibre? (Inme se konsa natural fibre hei?)

• Rayon

• Nylon

• Silk

• Polyester

• Acrylic

A ___________Fibre is also a chain of small units joined together. (Ek ------ fibre small units ki joined chain bhi hota hei)

• Natural

• Silk

• Cotton

• Synthetic

• Wool

Many small units combine to form a large single unit called a _________. (Bhot si small units combine hokr ek large unit bnate hei jise _____ khte Hein.

• Natural

• Rayon

• Acrylic

• Polyester

• Polymer

Tags

NGSS.MS-PS1-1

In Polymer , The word poly & Mer means ? (Polymer mein word poly or mer khlate Hein?)

• Some & full

• Polythene & many

• Many & unit

• Unit & some

• Any & Unit

Tags

NGSS.MS-PS1-1

Silk fibre is obtained from? (Silk fibre kisse milta hei?)

• Silk plant

• Silk flower

• Cokoon

• Silkworm

• Siklworm

Cellulose is made up of a large number of _______ units. (Cellulose, _______ ki large number units se bnta hei.)

• Cotton

• Gulucose

• Sucrose

• Cellulars

• Glucose

Silk fibre obtained from silkworm was discovered in _______. (Silkworm see obtain hone wale silk fibre ko kha discover Kia gya.)

• Africa

• India

• Asia

• China

• Japan

Rayon was obtained by chemical treatment of ______? (Rayon ______ ke chemical treatment se milta hei )

• Wooo worm

• Silk worn

• Wood pulp

• Wood plup

• Flex

Tags

NGSS.MS-PS1-3