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Chapter 2
S Block Elements
Test - 12
1.
The basic character of alkali metal oxide decreases down the group.,
a) False
b) True
2.
A suspension of Mg (OH)
2
in water is called lime water.
a) False
b) True
3.
Carbonates of alkali metals are unstable towards heat except Li
2
CO
3
.
a) True
b) False
4.
Na
2
Co
2
. 10H
2
O is called Soda Ash.
a) True
b) False
5.
Solubility of sulphates of alkaline earth metals decreases down the group.
a) True
b) False
6.
Lattice energies of alkali metal salts are relatively low.
a) False
b) True
7.
In limited supply of oxygen, sodium reacts with it forming peroxide.
a) True
b) False
8.
Beryllium is quite active towards oxidation.
a) False
b) True
9.
Lithium is most reactive metal of the 1st group.
a) True
b) False
10.
Beryllium is hard as iron and hard enough to scratch glass.
a) True
b) False
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