Properties of Plastics
Properties of Plastics
The first man - made plastic was created by Alexander Parkes who publicly demonstrated it in 1862 at the Great International Exhibition in London. Plastic is an organic material of high molecular weight with specific properties. Most of the plastics are polymers having long chains.
A plastic is a synthetic material, which can be moulded or set into any desired shape when soft, and then harden to produce articles. Some plastics have lined some have cross links. They are usually synthetic, most commonly derived from petrochemicals, but many are partially natural.
Properties of Plastics:
Although different types of plastics differ in some physical and chemical properties, the following properties are common to most of them.
Which of the following are correct ? (a) The first man - made plastic was created by Alexander parks . (b) Plastics have much less toughness as compared to metals & Alloys like steel . (c) Plastics are much lighter in weight as compared to wood, metals etc .
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| Right Option : D | |||
| View Explanation | |||
Which of the following are correct ? (a) Plastic is an inorganic material of lower molecular weight with specific properties. (b) Plastics are poor conductors of heat, which make them suitable for making handles of cooking vessels, Use in refrigerators as foam core, making containers used in microwave ovens. | |||
| Right Option : B | |||
| View Explanation | |||
Plastic are mainly used by everyone because. | |||
| Right Option : A | |||
| View Explanation | |||
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