science
Grade-5
Easy
Question
Complete the following analogy.
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
- Teflon
- High-density polyethene
- Polystyrene
- Polyvinyl chloride
Hint:
Teflon is a non sticky material.
The correct answer is: Teflon
- PET is used to store soft drinks due to its chemically inert nature.
- Teflon is a type of plastic which repels oil and water which do not stick to it.
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Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
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II. Umbrellas are made from plastics.
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III. Electric wires have a plastic coating.
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II. It has a linear-linked arrangement of monomer units.
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III. Plastics are insoluble in water.
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