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.
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) Plastic was first created by Alexander Parks who publicly demonstrated it in 1862 at the Great International Exhibition in London. (b) Plastic is an organic material of high molecular weight with specific properties. | |||
Right Option : C | |||
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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 | |||
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Plastics are _____________ in water and it is used for making bottles, buckets, and other containers used for storing water. | |||
Right Option : B | |||
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My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
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My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
It has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice