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.Management Sciences
Category: S-BLOCK ELEMENTS
Which one of the following substances conducts electricity by the movement of ions ?
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A. Graphite
B. Copper
C. Molten sodium chloride
D. Mercury
Nitrates of which pair of elements give different products on thermal decomposition ?
A. Na K
B. Mg Ca
C. Li Na
D. Li Ca
Second ionization potential of alkali metals are very high due to_______________?
A. being s-block elements
B. inert gas configurations
C. ns1 electronic configuration
D. being metals
Electrolysis of dilute solution of NaCl results at the anode_______________?
A. sodium
B. hydrogen
C. chlorine
D. oxygen
A elements are named as alkali metals because_______________?
A. Their oxides are basic
B. Their oxide and hydroxides are water soluble
C. Both A & B
D. They are found in earth
Carnalite has chemical formula__________________?
A. KCI
B. KCI.MgCl2.6H2O
C. Na2B4O7.10H2O
D. CaCO3.MgCO3
Downs cell is used to prepare_________________?
A. Sodium carbonate
B. Sodium bicarbonate
C. Sodium metal
D. Sodium hydroxide
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