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The s-Block Elements
Describe 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.
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Why are alkali metals not found in nature?
Lithium shows similarities to magnesium in the chemical behaviour. What is the cause of this similarity?
What is the nature of lithium compounds?
Group 1 elements are called alkali metals. Why?
Why caesium can be used in photoelectric cell while lithium can not be?
In aqueous solution, Li+ ion has lowest mobility. Why?
Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.
The softness of group 1 elements increases down the group with increasing atomic number. Give reason.
Which is the most reactive alkali metal and why?
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