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- 1. Multiple Choice
Tick the correct option :
Acrylic fiber isis man made fiberit is soft and light weightit is artificial woolAll of the above - 2. Multiple Choice
Cellulose is made up of large number of _______ units.
sucrose
glucose
amino acids
dacron
- 3. Multiple Choice
Mention the type of polymer.
linear
natural
cross linked
synthetic
- 4. Multiple Choice
The synthetic fibre best suited to make this is ______ and is due to its _____property.
Polyester, Elasticity
Nylon,Elasticity
Polyester, High tensile strength
Nylon, High tensile strength
- 5. Multiple Choice
Which of the following plastics objects can be recycled?
i). Electric socket ii). Polythene bag iii).PVC pipe iv). Ashtray
A and B
B and C
A and D
C and D
- 6. Multiple Choice
Out of the following materials ::
a. Which materials are polyesters? b. Which material is a polyamide?
cotton, nylon
terylene, wool
cotton,wool
terylene, nylon
- 7. Multiple Choice
It is not advisable to wear clothes made of synthetic fibre while working near fire because
.
They are uncomfortable in those works
They melt on heating and cause heavy burns
They do not absorb moisture
They are shiny and lustrous
- 8. Multiple Choice
Thermosetting Plastics
Can be reshaped using heat and pressure.
Are lighter plastics
Can be recycled
Can not be reshaped using heat and pressure
- 9. Multiple ChoiceElectrical switches are made up ofmelaminebakelitePVCpolythene
- 10. Multiple Choice
Necklace : bead :: polymer : ________.
Monomer
Dimer
Tetramer
Trimer
- 11. Open Ended
Why do we make umbrella with synthetic fiber?
- 12. Multiple Choice
Identify the non biodegradable items from the following
Tooth brush
Frying pan handle
vegetable peel
cotton bag
Switches
- Answer choicesTagsAnswer choicesTags