Class 7 Exam > Class 7 Notes > Advance Learner Course: Science Class 7 > Important Questions: Synthetic Fibers And Plastics
Class 7 Science Important Question Answers - Synthetic Fibres and Plastics
Q.1 Name some natural fibres?
Answer: Fibres obtained from plants or animals is called natural fibres for examples cotton, wool, silk, etc.
Q2. What do you mean by synthetic fibres?
Answer: Fibres made by human beings using chemical substance is called synthetic fibre. A synthetic fibre is a chain of small unit of chemical substance joined together. These small units combine to form a large single unit called a polymer. The word ‘polymer’ comes from two Greek words; poly meaning many and mer meaning part/unit. So, a polymer is made of many repeating units.
Q3. Name a polymer occurs naturally?
Answer: Polymers that occur naturally is cellulose. Cellulose is made up of a large number of glucose units.
Polymer
Q4. Name a fibre having properties similar to that of silk.
Answer: Rayon.
Q5. Although rayon is obtained from a natural source, wood pulp, yet it is a man-made fibre. Why?
Answer: This is because rayon is obtained by chemical treatment of wood pulp.
Q6. Why does Nylon become very popular for making clothes for mankind?
Answer: Nylon is the first fully synthetic fibre prepared from coal, water and air in 1931. Nylon fibres are strong, elastic and light. It is lustrous and easy to wash. So, it became very popular for making clothes.
Q7. Is nylon fibre really so strong that we can make nylon parachutes and ropes for rock climbing?
Answer: Yes, It is because nylon thread is actually stronger than a steel wire.
Q8. Why does polyester fibre quite suitable for making dress material?
Answer: Fabric made from Polyester fibre does not get wrinkled easily. It remains crisp and is easy to wash. So, it is quite suitable for making dress material. Terylene is popular polyester.
Q9. Name a form of polyster which is used for making bottles, utensils, films, wires and many other useful products?
Ans: PET: PET (polyethylene terephthalate) is made from two monomers, terephthalic acid and ethylene glycol, by the process called condensation polymerization
Q10. Name the chemical used to make polyster?
Answer: Esters are the chemicals used to make polyster.
Q11. Why synthetic fibres are more popular than natural fibres?
Answer: Synthetic fibres dry up quickly, durable, less expensive, readily available and easy to maintain which makes them more popular than natural fibres.
Q12. Identify the Synthetic fibre appears to resemble wool?
Answer: acrylic.
The document Class 7 Science Important Question Answers - Synthetic Fibres and Plastics is a part of the Class 7 Course Advance Learner Course: Science Class 7.
All you need of Class 7 at this link: Class 7
|
18 videos|34 docs|19 tests
|
FAQs on Class 7 Science Important Question Answers - Synthetic Fibres and Plastics
| 1. What are synthetic fibers and plastics? |  |
Ans. Synthetic fibers are man-made fibers that are produced through chemical processes. They are designed to mimic natural fibers and are commonly used in the textile industry for making clothes, upholstery, and other fabric-based products. Plastics, on the other hand, are synthetic materials made from polymers, which are large molecules composed of repeating subunits. They are versatile and can be molded into various shapes, making them useful in a wide range of applications, such as packaging, construction, and electronics.
| 2. What are the advantages of using synthetic fibers and plastics? | |
Ans. There are several advantages of using synthetic fibers and plastics. Firstly, they are generally more durable and resistant to wear and tear compared to natural fibers. They also have better resistance to moisture, chemicals, and sunlight, making them suitable for outdoor applications. Additionally, synthetic fibers and plastics are often more affordable and easier to produce in large quantities, making them widely available for various purposes.
| 3. Are synthetic fibers and plastics harmful to the environment? | |
Ans. While synthetic fibers and plastics offer many benefits, their production and disposal can have negative impacts on the environment. The production of synthetic fibers and plastics involves the use of fossil fuels and chemicals, which contribute to greenhouse gas emissions and pollution. Moreover, when improperly disposed of, synthetic fibers and plastics can take hundreds of years to decompose, leading to litter and pollution in landfills, oceans, and other ecosystems.
| 4. Can synthetic fibers and plastics be recycled? | |
Ans. Yes, synthetic fibers and plastics can be recycled, but the process can be more challenging compared to recycling natural materials. Some types of synthetic fibers, such as polyester and nylon, can be mechanically recycled by melting and reshaping them into new products. Plastics can also be recycled through various processes, including mechanical recycling, chemical recycling, and energy recovery. However, the effectiveness of recycling depends on the type and quality of the synthetic fiber or plastic, as well as the availability of recycling facilities.
| 5. What are some alternatives to synthetic fibers and plastics? | |
Ans. In recent years, there has been a growing interest in finding alternatives to synthetic fibers and plastics to reduce their environmental impact. Some alternatives to synthetic fibers include natural fibers like cotton, hemp, and bamboo, which are biodegradable and renewable. As for plastics, bio-based plastics made from renewable resources, such as cornstarch or sugarcane, are gaining popularity. Additionally, there is a focus on developing more sustainable packaging materials, such as compostable and biodegradable options, as well as encouraging the use of reusable products to reduce plastic waste.
Related Exams
About this Document
|
2.5K Views |
|
4.65/5 Rating |
|
Dec 18, 2024 Last updated |
Document Description: Important Questions: Synthetic Fibers And Plastics for Class 7 2024 is part of Advance Learner Course: Science Class 7 preparation.
The notes and questions for Important Questions: Synthetic Fibers And Plastics have been prepared according to the Class 7 exam syllabus. Information about Important Questions: Synthetic Fibers And Plastics covers topics
like and Important Questions: Synthetic Fibers And Plastics Example, for Class 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Important Questions: Synthetic Fibers And Plastics.
Introduction of Important Questions: Synthetic Fibers And Plastics in English is available as part of our Advance Learner Course: Science Class 7
for Class 7 & Important Questions: Synthetic Fibers And Plastics in Hindi for Advance Learner Course: Science Class 7 course.
Download more important topics related with notes, lectures and mock test series for Class 7
Exam by signing up for free. Class 7: Class 7 Science Important Question Answers - Synthetic Fibres and Plastics
Description
Full syllabus notes, lecture & questions for Class 7 Science Important Question Answers - Synthetic Fibres and Plastics - Class 7 | Plus excerises question with solution to help you revise complete syllabus for Advance Learner Course: Science Class 7 | Best notes, free PDF download
Information about Important Questions: Synthetic Fibers And Plastics
In this doc you can find the meaning of Important Questions: Synthetic Fibers And Plastics defined & explained in the simplest way possible. Besides explaining types of
Important Questions: Synthetic Fibers And Plastics theory, EduRev gives you an ample number of questions to practice Important Questions: Synthetic Fibers And Plastics tests, examples and also practice Class 7
tests
|
18 videos|34 docs|19 tests
|
Download as PDF
|
Explore Courses for Class 7 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
ppt
,Sample Paper
,Previous Year Questions with Solutions
,Class 7 Science Important Question Answers - Synthetic Fibres and Plastics
,Viva Questions
,shortcuts and tricks
,Class 7 Science Important Question Answers - Synthetic Fibres and Plastics
,video lectures
,Summary
,mock tests for examination
,Objective type Questions
,Semester Notes
,Exam
,past year papers
,Free
,Important questions
,study material
,MCQs
,Extra Questions
,Class 7 Science Important Question Answers - Synthetic Fibres and Plastics
,practice quizzes
;
Additional Information about Important Questions: Synthetic Fibers And Plastics for Class 7 Preparation
Important Questions: Synthetic Fibers And Plastics Free PDF Download
The Important Questions: Synthetic Fibers And Plastics is an invaluable resource that delves deep into the core of the Class 7 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Important Questions: Synthetic Fibers And Plastics now and kickstart your journey towards success in the Class 7 exam.
Importance of Important Questions: Synthetic Fibers And Plastics
The importance of Important Questions: Synthetic Fibers And Plastics cannot be overstated, especially for Class 7 aspirants.
This document holds the key to success in the Class 7 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Important Questions: Synthetic Fibers And Plastics Notes
Important Questions: Synthetic Fibers And Plastics Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Important Questions: Synthetic Fibers And Plastics.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Important Questions: Synthetic Fibers And Plastics Notes on EduRev are your ultimate resource for success.
Important Questions: Synthetic Fibers And Plastics Class 7
The "Important Questions: Synthetic Fibers And Plastics Class 7 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 7 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Important Questions: Synthetic Fibers And Plastics on the App
Students of Class 7 can study Important Questions: Synthetic Fibers And Plastics alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Important Questions: Synthetic Fibers And Plastics,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Important Questions: Synthetic Fibers And Plastics is prepared as per the latest Class 7 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup