HARD
10th CBSE
IMPORTANT
Earn 100
Explain the following in terms of gain or loss of oxygen with one example each:
(i) oxidation (ii) reduction
Important Questions on Chemical Reactions and Equations
MEDIUM
10th CBSE
IMPORTANT
When the copper powder is heated strongly in air, it forms copper oxide.
Write a balanced chemical equation for this reaction.
Name (i) The substance oxidized, and (ii) The substance reduced.
MEDIUM
10th CBSE
IMPORTANT
When a magnesium ribbon is heated, it burns in air to form magnesium oxide.
Write a balanced chemical equation for this.
Name (i) substance oxidised and (ii) substance reduced.
HARD
10th CBSE
IMPORTANT
Define the following in terms of gain or loss of hydrogen with one example each:
(i) oxidation (ii) reduction
MEDIUM
10th CBSE
IMPORTANT
What is meant by (a) displacement reaction, and (b) double displacement reaction? Explain with the help of one example each.
HARD
10th CBSE
IMPORTANT
Why are decomposition reactions called the opposite of combination reactions? Explain with equations of these reactions.
MEDIUM
10th CBSE
IMPORTANT
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.
MEDIUM
10th CBSE
IMPORTANT
What happens when a piece of iron metal is placed in a copper sulphate solution? Name the type of reaction involved.
MEDIUM
10th CBSE
IMPORTANT
Write a 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.
