S-BLOCK ELEMENTS

A. KCI
B. KCI.MgCl2.6H2O
C. Na2B4O7.10H2O
D. CaCO3.MgCO3

A. It corrodes the organic tissues
B. It is used in soda water
C. It reacts with chlorine gas
D. It reacts with fats to form soap

A. They are more reactive
B. They have greater atomic radii
C. They have smaller atomic sizes
D. All

A. Smaller electronegativity of alkali metals
B. Smaller ionic radius of these metals
C. De-excitation of electrons from higher energy levels to low energy level
D. Excitation of electrons from low energy levels to higher energy levels

A. Hydroxide ions to reach anode
B. Chlorine gas to mix
C. Cathode to decay
D. All of the above

A. Absorbs moisture and remains solid
B. Absorbs moisture and turns to liquid form
C. Loses water of crystallization
D. Increases the number of water of crystallization

A. NaHCO3
B. NaNO3
C. Na2CO3
D. Na2CrO4

A. Lose water and remain solid
B. Gain water and remain solid
C. Gain water and become liquid
D. Remains unchanged

A. Water
B. NaCl
C. Aqueous sodium hydroxide
D. H2SO4

A. Sodium carbonate
B. Sodium bicarbonate
C. Sodium metal
D. Sodium hydroxide