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) 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 _____________ in weight . | |||
| Right Option : B | |||
| View Explanation | |||
The first man-made plastic was created by ______________ . | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
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.
Om Umang
10thIt 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.
Cheshta
10thAbhyas 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.
Manish Kumar
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt 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
Barkha Arora
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thIt 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.
Eshan Arora
8thMy 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.
Shivam Rana
7thMy 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.
Hiya Gupta
8thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
