Q38 of 152 Page 46

What happens when a piece of iron metal is placed in copper sulphate solution? Name the type of reaction involved.

Iron sulphate and copper metal is fromed if a piece of iron metal is placed in copper sulphate solution.This is a type of displacement reaction.



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37 Why are decomposition reactions called the opposite of combination reactions? Explain with equations of these reactions. 37 Express the following facts in the form of a balanced chemical equation:

"When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed".

 38 Write balanced chemical equation with state symbols for the following reaction:

Barium chloride solution reacts with sodium sulphate solution to give insoluble barium sulphate and a solution of sodium chloride.

 39 In the reaction represented by the following equation:


(a) name the substance oxidized


(b) name the substance reduced


(c) name the oxidizing agent


(d) name the reducing agent