Question

write the chemical equation of the reaction in which the following changes have taken place with an example

​

Answer 1

Explanation:

where is the following changes?

Answer 2

Explanation:

◆change in colour .

--------------------------------

potassium dichromate solution and sulphur dioxide are characterised by change in colour from Orange to green.

◆Change in temperature

-------------------------------------

chemical reaction between quicklime and water is characterised by change in temperature

●CaCO3(s)+Heat-----------)Hai(s)+CO2(g)

◆formation of precipitate

–-------------------------------------

Ca(OH)2(aq)+CO2---------;-)CaCO3(s)【precipitate】+H2O(I)