Question

1) ¡, What is reactivity series of metals? Arrange the metals zinc, magnesius
aluminium, copper and iron in a decreasing order of reactivity
¡¡, What is observed when you put
a) Some zinc pieces into blue copper sulphate solution.
b) Some copper pieces into green ferrous sulphate solution.
¡¡¡,Name a metal which combines with hydrogen gas. Name the compound
formed.​

Answer 1

Explanation:

1)

i)Metal reactivity series is a series of metals where they are arranged in order of their reactivities.

Mg>Al>Zn>Fe(Decreasing order)

ii)

a)When some zinc peices are drooped into blue colored copper sulphate solution,Zinc sulphate is formed and hydrogen gas is liberated..

CuSO4 + Zn = ZnSO4 + H2

b)When some copper prices are drooped in green colored ferrous sulphate solution,No reaction takes place as Iron is more reactive than Cu and Cu falis to displace iron from it's sulphate solution.

FeSO4 + Cu = No reaction

c)Na(Sodium)

When Na reacts with hydrogen ,Sodium hydride is formed.

Hope it will help you....