Solution of Chapter 3. Reactivity of Metals (Science Lab Manual Book)

AIM

(i) To observe the action of Zn, Fe, Cu and Al metals on the following salt solutions :

(a) ZnSO₄(aq.)

(b) FeSO₄(aq.)

(c) CuSO₄(aq.)

(d) Al₂(SO₄)₃(aq.)

(ii) To arrange Zn, Fe, Cu and Al (metals) in the decreasing order of reactivity based on the above result.

What is the basic principle involved in this experiment?

Why is there is a difference in reactivity of different metals?

Which reaction is used to determine the relative reactivities of metals? Define the type of reaction.

Name the most reactive & the least reactive metal.

Which is more reactive Zinc or copper? How do you know that?

What does the reactivity series of metals indicate? And why it is needed.

What will happen when an iron nail is dipped in a copper sulphate solution?

Why are gold and silver used for ornaments?

Can we store ZnSO₄ solution in Al vessel?

Describe the colors of the following solutions:

(i) Copper Sulphate

(ii) Ferrous Sulphate

(iii) Zinc Sulphate

(iv) Aluminum Sulphate

Describe the colors of the following metals:

(i) Zinc (Zn)

(ii) Iron (Fe)

(iii) Copper (Cu)

(iv) Aluminum (Al)

Arrange the following metals in decreasing order of reactivity.

Zn, Cu, Fe, Al

What materials will you use for comparing the reactivities of Aluminium and Iron? Give a reaction.

What is a salt? Give names of salts that you use in day-to-day life.

Why is salt used in determining the reactivities of metals?

What will happen if a less reactive metal reatcs with a salt of higher reactive metal?

Why do we need to clean the metals with sandpaper prior to the experiment?

Complete the following reactions-

i. Cu + Al₂(SO4)₃ ⇒

ii. Cu + CuSO₄ ⇒

iii. Zn + FeSO₄⇒

Can Copper displace hydrogen from acids & water?

Complete the reaction & give reason:
Zn + H₂O →