In 1952 the official birthday of the new monarch, Queen Elizabeth II was celebrated in June in Canada as it was in the United Kingdom. But the next year it was moved to the Monday immediately preceding 25th May and Victoria Day was also moved from 24th May to that Monday.n 1952 the official birthday of the new monarch, Queen Elizabeth II was celebrated in June in Canada as it was in the United Kingdom. But the next year it was moved to the Monday immediately preceding 25th May and Victoria Day was also moved from 24th May to that Monday.
The production of calcium oxide from limestone is one of the oldest chemical transformations produced by man. Its use predates recorded history. Most ancient languages have a word for calcium oxide. In Latin it is calx, from which the name of the element calcium is taken.In Old English, its name is l m, which is the origin of the modern commercial name for calcium oxide, namely lime.aCO 3 (s). CaO(s) + CO 2 (g). This reaction is reversible; calcium oxide will react with carbon dioxide to form calcium carbonate. The reaction is driven to the right by flushing carbon dioxide from the mixture as it is released.
Cement: Calcium oxide is a key ingredient for the process of making cement. As a cheap and widely available alkali. About 50% of the total quicklime production is converted to calcium hydroxide before use. Both quick- and hydrated lime are used in the treatment of drinking water.