Physical and Chemical Change
Physical and Chemical Change
There can occur two type of changes in a substance. These changes are Physical and Chemical changes.
Physical Changes :
Physical changes are the changes in which no new substance is formed. E.g. the formation of ice from water is a physical change. Physical changes are most of the times for a short span of time, better we can say these changes are temporary and can be reserved. Hence physical change can be defined as: A physical change is the one that changes the shape, size, physical state or appearance of substance but not its chemical composition.
Characteristics of a physical change :
Examples of physical change :
Formation of dew, Drying if wet clothes, Breaking of glass, Bending of glass tube, Sublimation of iodine, Crushing of iron, Melting of wax, Crystallization of sugar, Beating aluminum to make aluminum foil , Cutting of nails
Chemical Change :
A chemical change occurs when two or more chemical substances react to produce new substance with a different set of properties. It is permanent which cannot be reversed.
Characteristics of chemical change :
Example of chemical change :
Rusting of iron, Burning of candle, Digestion of food, Burning of food, Decomposition of water, Curdling of milk, Butter turning rancid, Ripening of fruit, Drying of paint, Change in color of an apple cut into halves, Clotting of blood, Changes in color of brinjal slice, Digestion of food, Acid base neutralization reaction, Photosynthesis, Removing cream from milk.
Which of the following is/are the characteristics of chemical change ? | |||
| Right Option : D | |||
| View Explanation |
Which of the following are correct : (a) Physical changes are the changes in which no new substance is formed. (b) A chemical change occurs when two or more chemical substances react to produce new substance with a different set of properties | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) Physical change is reversible and temporary. (b) The chemical change is irreversible and permanent. (c) The composition of a substance changes during a chemical change. | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
My 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
8thIt 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
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thMy 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.
Ayan Ghosh
8thA 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 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
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thIt 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
8thAbhyas 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
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
