Question Bank No: 2

1. In the preparation of sodium carbonate (Na2CO3) which of the following is used?

 a)Slaked lime
 b)Quick lime
 c)Lime stone
 d)Sodium hydroxide

2. Sodium conducts electricity because

 a)It is a soft alkali metal
 b)It has only one electron in the outermost orbit
 c)It has mobile electrons
 d)It gives hydrogen with water

3. The gas evolved on heating Na2CO3 is

 a)CO2
 b)CO
 c)Water vapour
 d)No gas

4. Compared with the alkaline earth metals, the alkali metals exhibit

 a)Smaller ionic radii
 b)Highest boiling points
 c)Greater hardness
 d)Lower ionization energies