
A metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle.
Write a balanced equation for the reaction if one of the compounds formed is calcium chloride.

Important Questions on Chemical Reactions and Equations
Explain the following in terms of gain or loss of oxygen with one example each:
(i) Oxidation
(ii) Reduction


Translate the following statement into chemical equation and then balance them.
Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

Translate the following statement into chemical equation and then balance them.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

Identify the substance that is oxidised and the substance that is reduced in the following reaction.



A metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle.
Name the gas that extinguishes the burning candle.
