Question

23. Sample pieces of five metals A,B,C,D and E were added to the tabulated
solutions separately. The results observed are shown in the table:
No
Metal
FeSO4
CuSO4 ZnSO4 AgNO3 Al2(SO4)3
A
No Change No Change No
Coating No
Change
on metal
Change
B
Grey
Brown
No
Coating No
Deposit on coating on Change
on metal
Change
metal
metal
с
No Change No Change
No
No
Change Change Change
D
No Change
No
Coating No
Change
on metal
Change
E
Brown
New
New
No
coating coating
coating Change
Based on the observations recorded in the table, answer the following:
23 (1). Which is the most reactive metal ?
23 (2). Which is the least reactive metal?
23 (3). Arrange the metals A,B,C,D and E in decreasing order to their
reactivity ?​

Answer 1

Answer:

(a) E is most reactive. Because it react with most substances.

(b) E>B>A>C>D : The more it reacts the more reactive it is .  

(d) Container of metal D can be used for this purpose as it does not react with any of them.

(e) Aluminium and magnesium sulphates can be used to store in any container because the react with none.

Explanation: