Question

Calcium oxide reacts with water to form a product. Identify the product and the type of reaction
a) Calcium carbonate ,decomposition reaction
b) Calcium hydroxide, displacement reaction
c) Calcium hydroxide, combination reaction
d) Calcium carbonate, combination reaction

Answer 1

Answer:

OPTION (C)

Explanation:

Calcium oxide and water react to form only a single product, calcium hydroxide. So the reaction is a combination reaction.

Answer 2

Answer:

c) Calcium hydroxide, combination reaction

Explanation:

• calcium oxide reacts vigorously with water to produce slaked lime releasing a large amount of heat

CaO (S) + H2O(l) → Ca(OH)2(aq) + Heat

• When Calcium carbonate reacts with water to form a single product, calcium hydroxide.
• Such a reaction in which single product is formed form two or more reactants is known as Combination Reaction.

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