Give reasons for the following:
i) Reaction of calcium with water is less violent.
ii) Prior to reduction the metal sulphides and carbonates must be converted into Metal oxide for extracting metals.
Answers
ANSWER
1. Calcium reacts with water to form calcium hydroxide and hydrogen. The heat produced in this reaction is less which is insufficient to burn the hydrogen gas which is formed. Hence, the reaction of calcium with water is less violent.
2. It is easier to obtain metal from its oxide rather than its carbonates and sulphides. Therefore, these ores are first converted to oxide and then reduced to metal.
Brainlist Please ☺️.
Calcium react with water more vigorous as it is highly reactive metal .The reaction is exothermic reaction a large amount heat evolve which heat water so it decreases the violence .
Calcination and roasting is the phenomenon by which sulphide and carbonate ore is reduced because reduced metal easily seperated by chemical reaction and it is lighter too .So reduction is necessary.