CBSE Class 8 Science Synthetic Fibers And Plastics Assignment Set F

CBSE Class 8 Science - Synthetic Fibres And Plastics (7)

Chapter wise assignments are being given by teachers to students to make them understand the chapter concepts. Its extremely critical for all CBSE students to practice all assignments which will help them in gaining better marks in examinations. All assignments available for free download on the website are developed by the best teachers having many years of teaching experience in CBSE schools all over the country. Students, teachers and parents are advised to download the CBSE study material.

 

1. Answer the following in brief:

a) Name the process of formation of polymer from its monomer.

b) What are blended fibres ? Give any two examples.

2. Give reasons for the following:

a) Nylon is used in making socks.

b) Polyester is used for making sails for boats.

c) Synthetic fabric is uncomfortable during summers.

d) Terylene clothes should not be worn while working in kitchen.

3. Name the monomer unit of the following:

a) Cellulose

b) Polyester

c) P.V.C.

d) Polyethene

4. Differentiate between:

a) Thermoplastics & Thermosetting plastics

b) Synthetic fibres & natural fibres

c) Biodegradable & non-biodegradable materials

5. Why are plastics preferred to natural materials?

6. What do the 4 R’s in 4R principle stand for?

7. Manufacturing synthetic fibres is actually help in the conservation of forests. Comment.

8. Why is Bakelite used for making electrical switches?

9. Why do we use melamine for making kitchenware?

10. Write True or False against the following statements:

a) Polyester shrinks on washing.

b) Plastics are not affected by heat.

c) Acrilon is pure wool obtained from sheep.

d) Bakelite is a thermoplastics plastics.

e) P.V.C. is a good conductor of plastics.

11. Write full forms of:

a) P.V.C.

b) P.E.T.

12. State two advantages & disadvantages of synthetic fibres over natural fibres.

Please click the below link to access CBSE Class 8 Science - Synthetic Fibres And Plastics (7)

Tags: 

 


Click to View or Download pdf file
Click for more Science Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Applied Mathematics Introduced by CBSE as Elective for Class 11 and Class 12

Mathematics Syllabus Revised by CBSE at the Senior Secondary Level! The Central Board of Secondary Education (CBSE) to offer 'Applied Mathematics' as an Elective for XI and XII standard students. The elective subject, Applied Mathematics, is focused at evolving an...

Class 10 Datesheet announced

CBSE has announced the date sheet for the remaining class 10 Board Exams, see dates below

CBSE Boards Answer Sheet Evaluation Class 10 and Class 12

HRD Minister Ramesh Pokhriyal, through a video conference with all the education ministers of the state, discussed the further steps to be taken to smoothen the education process during the Covid-19 lockdown. The most important topic which was discussed repeatedly on...

Critical notice issued by CBSE relating to Boards and other classes

Critical notice issued by CBSE relating to Boards and other classes

Live session by CBSE Experts for holistic wellbeing

CBSE and Fit India Mission have collaborated to provide live sessions by experts covering a range of topics for holistic well-being of school going children, which will include simple actionable tips around Basic Exercises, Nutrition, Yoga & Meditation, boosting...

CBSE Recommends Arogya Setu App

Written recommendation from CBSE to school principals for initiating the Arogya Setu App! The Central Board of Secondary Education has advised to all school principals through a written communication recommending the “Arogya Setu App” and Health Ministry's protocol for...

×
Studies Today