Class 7 Exam > Class 7 Videos > Science Class 7 > Some Examples of Chemical Changes- 2
Some Examples of Chemical Changes- 2 Video Lecture | Science Class 7
|
111 videos|246 docs|28 tests
|
FAQs on Some Examples of Chemical Changes- 2 Video Lecture - Science Class 7
| 1. What are some examples of chemical changes in everyday life? |  |
Ans. Some examples of chemical changes in everyday life include burning wood, rusting of iron, cooking food, digestion of food in our body, and the fermentation of grapes to make wine.
| 2. How can we identify a chemical change? | |
Ans. There are several signs that can help us identify a chemical change. These include the formation of a new substance with different properties, a change in color, the release of gas, production of heat or light, and the formation of a precipitate (a solid that forms from a liquid solution).
| 3. What is the difference between a physical change and a chemical change? | |
Ans. A physical change is a change in the appearance or state of matter without any change in its chemical composition. Examples of physical changes include melting ice, boiling water, and crushing a can. On the other hand, a chemical change involves the formation of new substances with different properties. Examples of chemical changes include burning paper, cooking food, and the digestion of food in our body.
| 4. Why is it important to understand chemical changes? | |
Ans. Understanding chemical changes is important because it helps us understand how substances react with each other and how new substances are formed. It is crucial in fields such as chemistry, biology, and medicine, where knowledge of chemical reactions is essential in developing new drugs, understanding metabolic processes, and designing experiments.
| 5. Can physical changes be reversed? | |
Ans. Yes, physical changes can often be reversed. For example, if we melt ice, we can freeze it back into solid form. However, in chemical changes, the new substances formed cannot be easily reversed back to their original form. Once a chemical change occurs, it is usually difficult or impossible to revert the substances back to their original state.
About this Video
|
1.7K Views |
|
4.74/5 Rating |
|
Nov 21, 2024 Last updated |
Video Description: Some Examples of Chemical Changes- 2 for Class 7 2024 is part of Science Class 7 preparation.
The notes and questions for Some Examples of Chemical Changes- 2 have been prepared according to the Class 7 exam syllabus.
Information about Some Examples of Chemical Changes- 2 covers all important topics for Class 7 2024 Exam.
Find important definitions, questions, notes, meanings, examples, exercises and tests below for Some Examples of Chemical Changes- 2.
Introduction of Some Examples of Chemical Changes- 2 in English is available as part of our Science Class 7 for Class 7 & Some Examples of Chemical Changes- 2 in
Hindi for 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.
Description
Video Lecture & Questions for Some Examples of Chemical Changes- 2 Video Lecture | Science Class 7 - Class 7 full syllabus preparation | Free video for Class 7 exam to prepare for Science Class 7.
Information about Some Examples of Chemical Changes- 2
Here you can find the meaning of Some Examples of Chemical Changes- 2 defined & explained in the simplest way possible.
Besides explaining types of Some Examples of Chemical Changes- 2 theory, EduRev gives you an ample number of questions to practice Some Examples of Chemical Changes- 2 tests,
examples and also practice Class 7 tests.
|
111 videos|246 docs|28 tests
|
|
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
practice quizzes
,ppt
,MCQs
,study material
,Previous Year Questions with Solutions
,Some Examples of Chemical Changes- 2 Video Lecture | Science Class 7
,Exam
,Sample Paper
,mock tests for examination
,Extra Questions
,Summary
,Objective type Questions
,Viva Questions
,Some Examples of Chemical Changes- 2 Video Lecture | Science Class 7
,past year papers
,Semester Notes
,video lectures
,shortcuts and tricks
,Some Examples of Chemical Changes- 2 Video Lecture | Science Class 7
,Free
,Important questions
;
Study Some Examples of Chemical Changes- 2 on the App
Students of Class 7 can study Some Examples of Chemical Changes- 2 alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Some Examples of Chemical Changes- 2,
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 Some Examples of Chemical Changes- 2 is prepared as per the latest Class 7 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup on EduRev and stay on top of your study goals
10M+ students crushing their study goals daily