CBSE Class 6 Answered
When a candle is lighted,following observations are made:
1)the candle burns
2)size of the candle reduces
3)wax melts
4)melted eax solidifies
Which of the above changes arw reversible?
Asked by Z3hdamalik | 03 Jan, 2019, 10:12: PM
Expert Answer
When a candle is lighted, the following observations are made:
1)When the candle burns is an irreversible change.
When a candle is burned, chemical reactions take place between the wax and oxygen.
These chemical reactions release energy in the form of heat and light.
These chemical reactions can't be reversed back.
2) The size of the candle reduces
It is an irreversible change.
3)Wax Melts
Melting of wax is a physical change.
In melting of wax, only the state of wax changes from solid to liquid.
It is a reversible reaction and no new substance is formed.
4)melted wax solidifies
It is a reversible process.
Answered by Varsha | 04 Jan, 2019, 11:33: AM
Concept Videos
-
Changes around Us - 1
This video explains different kinds of changes.
CBSE 6 - Science
Asked by 2016000042 | 07 Feb, 2024, 08:31: PM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by mercypriya82 | 04 Feb, 2022, 07:22: PM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by meenasudama39 | 23 Jul, 2021, 10:13: PM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by skdixit8208 | 29 Jun, 2021, 11:44: AM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by vidhilokeshmerai | 29 Apr, 2021, 11:24: AM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by amitkumar310806 | 05 Feb, 2021, 11:58: AM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by drthilakyshetty | 10 Jan, 2021, 01:27: PM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by pournimapawar09042009 | 04 Dec, 2020, 01:37: PM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by gurunarayansah | 13 Sep, 2020, 02:27: PM
ANSWERED BY EXPERTCBSE 6 - Science
Asked by rajiraju60822 | 24 Jul, 2020, 12:36: PM
ANSWERED BY EXPERT
