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The S-Block Elements

Question
CBSEENCH11007162
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How is quick lime prepared on a commercial scale? How is it converted into slaked lime?

Solution
Commercial preparation: Quicklime is anhydrous calcium oxide (CaO) and is formed by heating limestone (CaCO3) in a specially designed kiln.
CaCO subscript 3 space rightwards harpoon over leftwards harpoon with Heat on top space CaO space plus space CO subscript 2 semicolon space space space increment straight H space equals space plus 179.9 space kJ
Formation of slaked lime: Slaked lime is formed when quicklime is added to water. The reaction is highly exothermic in nature and called slaking of lime.
CaO space plus space straight H subscript 2 straight O space rightwards harpoon over leftwards harpoon space space space Ca left parenthesis OH right parenthesis subscript 2 space plus space Heat

Some More Questions From The s-Block Elements Chapter

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?

Why alkali metals do not form M2+ ions?

Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

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