Question

A shining metal M on burning gives a dazzling white flame and changes to a white powder N
(i) Identify M and N
(ii) represent the above reaction in the form of a balanced chemical equation
(iii) Does M undergo oxidation or reduction in this reaction. justify?

Answer 1

Answer:

1-Mg

2-Mg+o₂ gives 2MgO

3-metal M  undergo oxidation

Explanation:

1)Magnesium, a group IIA alkaline earth metal burns in air with a bright white flame, producing a white smoke of solid magnesium oxide. What remains after burning is solid magnesium oxide.

2) Mg+o₂ gives 2MgO

3) metal M  undergo oxidation as addition of oxygen takes place in the above reaction

Answer 2

(i) M is Magnesium (Mg) and N is Magnesium Oxide (MgO).

(ii) The above reaction can be represented in the form of a balanced chemical equation as follows :

2Mg + O2 ----> 2MgO

(iii) In this reaction, Mg undergoes oxidation as the reaction is combustion and in this Mg is combining with oxygen.