Question

ெசாக ெதாடƫ|¢ அைமவேத ____________ என~ப.
அ) எ¸{¢ ஆ) ெசா இ) ெதாடƫ

Answer 1

Step-by-step explanation:

Black residue will appear due to formation of iron in tubes (II) and (IV) because of displacement reaction taking place and the reaction is given below...

2Al(s)+3FeSO

4

(aq)→Al

2

(SO

4

)

3

(aq)+3Fe(s) (Black residue)

Zn(s)+FeSO

4

(aq)→ZnSO

4

(aq)Fe(s) (Black residue)