ICSE Class 9 Answered
Give 2 examples of each of the following changes occurring during a chemical reaction :
1) Change of state of the reactants
2)Change of colour
3)Evolution of gas
4) Formation of precipitate
Asked by 05sumanlata | 19 May, 2019, 11:27: AM
Expert Answer
Characteristics of chemical reaction:
1) Change of state of the reactants:
Example:
Ammonia gas reacts with hydrogen chloride gas to produce solid ammonium chloride.
2)Change of colour
Example:
Wehne few pices of Fe are added to the blue copper sulphate solution, the colour of the solution fades
and turns into light green due to the formation of ferrous sulphate.
3)Evolution of gas
Example:
4) Formation of precipitate
Example:
When silver nitrate is added to sodium chloride, white insoluble precipitate of silver chloride is formed.
When ferrous sulphate solution is added to the sodium hydroxide, a dirty green precipitate ferrous hydroxide is formed.
Answered by Varsha | 20 May, 2019, 09:40: AM
Application Videos
Concept Videos
ICSE 9 - Chemistry
Asked by patnaikarpita14 | 03 Sep, 2021, 08:13: PM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by yu12mi3456 | 24 Jul, 2021, 10:24: PM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by rajwansh931 | 08 Dec, 2020, 04:48: PM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by durvaangre01 | 28 Oct, 2020, 10:22: AM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by hemanginivyas92.9spicertl | 14 Aug, 2020, 10:01: AM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by malharshah5920.9sdatl | 25 Apr, 2020, 11:07: AM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by jalondev1995 | 09 Sep, 2019, 01:16: PM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by Manojbrock7406 | 04 Jul, 2019, 08:13: PM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by 05sumanlata | 19 May, 2019, 11:27: AM
ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by iqbalpreet9875 | 15 Oct, 2018, 06:56: PM
ANSWERED BY EXPERT