Question

calcium oxide reacts wigirousky with water to produce spake lume (calcium hydroxide ) releasing a large amount of heate.This is a
a) combination reaction
b) displacement reaction
c) Double displacement reaction
d) combination reaction​

Answer 1

Answer:

CaO(s)+H

2

O(l)→Ca(OH)

2

(aq)

A combination reaction is a reaction where two or more elements or compounds combine to form a single compound.

Calcium oxide combines with water to form calcium hydroxide. Hence, it is a combination reaction.

It is an exothermic reaction as a lot of heat liberate with hissing sound during the reaction.

Hence, option D is correct.

Answer 2

Answer:

d.combination reaction.

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