Question

The arrangement of metals in a vertical column in the decreasing order of their reactivity is called the
activity series of metals or the reactivity series.
The most reactive metal is placed at the top position of the reactivity series. The least reactive metal
is at the bottom of the reactivity series.
By careful and repeated experiments, the reactivity series has been established. The study mainly
included reaction of metals with water, acids and salt solutions. Hydrogen was one of the products
in most cases when metals react with acids.
Hydrogen, though a non-metal, has been included in the activity series of metals not only for
comparison but also for its tendency to lose its valence electron to form a cation.
i. Which element is placed at the top of the reactivity series?
ii. Which metal will not liberate hydrogen gas on reaction with an acid?
iii. Name the only non-metal in the reactivity series.
iv. Which metal can displace copper from its salt solution?

Answer 1

Answer:

1 = potassium

3= hydrogen

4= iron

2 =gas

Answer 2

Answer:

Reactivity Series

Explanation:

(a) Reactivity series is the series of arrangement in a vertical column in decreasing order of their reactivities. (b) Hydrogen is not a metal but it is placed in the reactivity series of metals due to the fact that like metals hydrogen also loses electrons and forms positive ions.