Long Answer TypeExplain why can alkali and alkaline earth metals not be obtained by chemical reduction methods?
In the process of chemical reduction, oxides of metals are reduced using a stronger reducing agent. alkali and alkaline earth metals are themselves strong reducing agent and hence cannot be extracted by reduction of their oxides and alkaline earth metals.
alkali metals being highly electron positive cannot be displaced from the aqueous solution of their salts by other metals.
Short Answer TypeLong Answer TypeCompare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. (a) Nitrates (b) Carbonates (c) Sulphates.
Starting with sodium chloride how would you proceed to prepare (i) sodium metal (ii) sodium hydroxide (iii) sodium peroxide (iv) sodium carbonate?
Describe the importance of the following: (i) limestone (ii) cement (iii) plaster of paris.
Multiple Choice QuestionsAmongst the following, select the element having highest ionization enthalpy.
Sodium
Potassium
Beryllium
Magnesium
The main oxides formed on combustion of Li, Na and K in excess of air are, respectively:
LiO2, Na2O2 and K2O
LiO2, Na2O2 and KO2
LiO, Na2O2 and KO2
LiO, Na2O2 and KO2
Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?
CaSO4
BeSO4
BaSO4
BaSO4
The correct statement for the molecule, CsI3 is
It is a covalent molecules
It contains Cs+ and I3-
It contains Cs3+ and I- ions
It contains Cs3+ and I- ions
Which of the following on thermal decomposition yields a basic as well as an acidic oxide?
NaNO3
KClO3
CaCO3
CaCO3
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