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CBSE - VIII - Science - Synthetic Fibres and Plastics
what is palstic
Asked by shanyelsa
22nd July 2021,
8:20 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
So many things are made up of plastic? why?
Asked by kunjuzzkunju419
29th June 2021,
8:23 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
who made the plastic bags
Asked by sd092736
5th July 2020,
3:06 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
why is an nylon polyester and melamine and bakelite not mixed eachother bfor making switch s
Asked by sujathaprakashvv
3rd July 2020,
8:01 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Write a note on melamine? Explain.
Asked by desaimohan347
11th February 2020,
7:38 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
what is thermosetting plastic
Asked by kartik1010msd
9th December 2019,
7:46 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
define monomers
Asked by nsabhisharma
10th July 2019,
7:07 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Give in detail the six steps you should follow to prevent the pollution due to plastic?
Asked by gspublicschool
1st July 2019,
7:56 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
(1) Explain three properties of plastic that makes it very very popular.Name three products made on the basis of these properties? (2) Explain in detail,the preparation of rayon fiber.Give reason,why is it called artificial silk? (3) Give a detailed account of the use of plastic? (4) Give in detail the six steps you should follow to prevent the pollution due to plastic? (5) What kind of dress material will you recommend for workers in metal and chemical industries?Give reasons for your answer.
Asked by gspublicschool
26th May 2019,
7:40 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Which property of plastics makes them so useful but also makes them an envirnmental hazard ?
Asked by sharanyanigam
7th May 2019,
3:39 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
What is Teflon
Asked by harshadkatte9199
20th March 2019,
3:29 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
What is vulcanization
Asked by rehan200711
13th December 2018,
11:42 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
what is the means of pouras
Asked by rkghunawat1981
8th August 2018,
9:23 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Plastics are very useful materials . Why then there is a concern today about their increasing use ?
Asked by sangita
10th June 2017,
10:30 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Plastics are very useful materials . Why then there is a concern today about their increasing use ?
Asked by sangita
9th June 2017,
9:42 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Why is thermosetting plastic stronger than thermoplastic?
Asked by amrikj1947
13th August 2016,
9:15 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Suggest some measures to save the environment from plastics.
Asked by Topperlearning User
22nd July 2016,
3:37 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Discuss the properties of plastics.
Asked by Topperlearning User
22nd July 2016,
3:36 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
if in linear arrangement, all the monomers are in a straight line than how are the lines connected?
Asked by sudhanshujha0120
19th April 2016,
5:55 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
(a) Explain the difference between thermoplastics and thermosetting plastics (two differences each). (b) Choose the thermoplastics and thermosetting plastics from the following: Melamine, Polythene, Bakelite, Polyvinyl chloride (PVC) (c) Explain why, plastic containers are preferred for storing food.
Asked by Topperlearning User
13th July 2015,
10:55 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
What is meant by biodegradable and non-biodegradable materials? Give examples of two biodegradable and two non-biodegradable materials.
Asked by Topperlearning User
13th July 2015,
10:55 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
What is the need for recycling plastic bottles? Is it advisable to dispose off the plastic wastes by burning? Give reasons.
Asked by Topperlearning User
13th July 2015,
10:55 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Explain along with examples why, thermoplastics become soft on heating but thermosetting plastics do not become on heating. Draw labelled diagrams to illustrate your answer.
Asked by Topperlearning User
27th March 2015,
1:34 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
thermosetting plastics have------ between the chains
Asked by raj_anvekar
6th July 2014,
12:19 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
plastics are boon or bane?
Asked by Shriti
30th May 2014,
3:08 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Asked by ruchika sureka
20th May 2014,
1:58 PM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Why are plastics not suitable for building large and heavy structures?
Asked by Topperlearning User
30th April 2014,
7:51 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Plastics are replacing metals in car industry. Give two possible reasons to support your answer.
Asked by Topperlearning User
30th April 2014,
7:50 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Give reason. Thermoplastics can be recycled.
Asked by Topperlearning User
30th April 2014,
7:49 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Burning of plastics is not advisable. Give one reason to support this statement.
Asked by Topperlearning User
30th April 2014,
7:47 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Which property of Bakelite makes it feasible to be used for making electrical switches?
Asked by Topperlearning User
30th April 2014,
7:47 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Plastic pipes are preferred than metal pipes. Why?
Asked by Topperlearning User
30th April 2014,
7:45 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
A thermosetting plastic is used to make kitchenware and fabrics which are fire resistant. Name the thermosetting plastic.
Asked by Topperlearning User
30th April 2014,
7:45 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Why are plastic handles preferred in sauce pan?
Asked by Topperlearning User
30th April 2014,
7:44 AM
CBSE - VIII - Science - Synthetic Fibres and Plastics
Place a plastic spoon and a metal spoon in a jug of hot water. Which one can you hold directly? Why?
Asked by Topperlearning User
30th April 2014,
7:44 AM
