Question

What is the answer of this?

Answer 1

i) In the first tube the reaction has taken place.

ii) Since iron(II) is more electropositive than copper, it can displace copper from its salt (CuSo4).

Fe + CuSo4-----------> FeSo4 +Cu

But copper is less electropositive than magnesium, it can't displace magnesium from its salt (MgCl2). Thus no reaction takes place.

iii) Single-Displacement reaction.

Answer 2

1 ) in test tube A reaction take place.

2) we recognize when colour of iron change and solution become brown because cute displace iron due to it high reactivity .

3)displacement reaction take place.