Question

Q6- Name a change around you which show change of position. Q7- Name a change in which new substance is formed. Q8- Name a change where colour change is observed. Q9- Name a change where shape is changed. Q10- Name a change where size is changed.​

Answer 1

Explanation:

Evolution of gas:

The chemical reaction between zinc and dilute sulphuric acid is characterized by the evolution of hydrogen gas.

Zn(s)+H

2

SO4(aq)→ZnSO

4

(aq)+H

2

(g)

2.Change in colour:

The reaction between the lead nitrate solution and potassium iodide solution.

Pb(NO

3

)

2

(aq)+2KI→PbI

2

(s)+2KNO

3

(aq)

In this reaction colour changes from colourless to yellow.

Answer 2

chemical change

both

physical

chemical

hope it helps you