Question

Burning of coal is a

(a) combination, reduction and exothermic reaction
(b) decomposition, oxidation endothermic reaction
(c) combination, oxidation and exothermic reaction
(d) combination, reduction and endothermic reaction​

Answer 1

(c) combination, oxidation and exothermic reaction.

Answer 2

Answer:

Explanation:

(i) When two or more reactants combine in a reaction to form a single product, it is called a combination reaction. (ii) e.g.: When a Magnesium strip is burnt in air, it combines with oxygen, to form white ash of magnesium oxide. (iii) 2Mg(s) + O2(g)→ 2MgO(s) (white ash) Magnesium Magnesium oxide