Short Answer TypeStarting with CaCO3, write balanced chemical equation showing the preparation of:
(i) CaO (ii) CaSO4 (iii) Ca(OH)2 (iv) Ca(HCO3)2 solution.
Long Answer TypeDescribe two important uses of the following;
(a) Caustic soda (b) Sodium carbonate (iii) Quick lime.
(i) Caustic soda
It is used:
(a) in the manufacture of sodium metal, soap (from oils and fats), rayon, paper, dyes and drugs,
(b) for mercerising cotton to make cloth unshrinkable.
(ii) Sodium carbonate
It is used:
(a) in laundries and in softening of water as washing soda,
(b) in the manufacture of glass, caustic soda, soap powders etc.
(iii) Quick lime
It is used:
(a) in the purification of sugar and in the manufacture of dyestuffs,
(b) in the manufacture of bleaching powder, slaked lime and lime colours.
What happens when,
(i) magnesium is burnt in air
(ii) quick- lime is heated with silica
(iii) chlorine reacts with slaked lime
(iv) calcium nitrate is heated?
Discuss the composition and manufacturing details of cement.
Or
Mention the main constituents of Portland cement.
Short Answer TypeContrast the action of heat on the following and explain your answer:
(i) Na2CO3 and CaCO3
(ii) MgCl2.6H2O and CaCl2.6H2O
(iii) Ca(NO3)2 and NaNO3.
Discuss the general characteristics and gradation in properties of alkaline earth metals.
Compare the alkali metals and alkaline earth metals with respect to (i) ionisation enthalpy (ii) basicity of oxides and (iii) solubility of hydroxides.
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