Define combination reaction. Give an example of a combination reaction that is also exothermic.

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Solution

A reaction in which two or more elements or compounds combine to form a single compound is called a combination reaction.
$C a O (s) + H_{2} O (I) \to C a (O H)_{2} (a q) + Heat$
It is also an exothermic reaction because heat evolves in this reaction.

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Question 3

Define combination reaction. Give an example of a combination reaction that is also exothermic.

(a) give an example for a combination reaction thats exothermic.

2 P b (N O_{3})_{2} (s) H e a t - -- \to 2 P b O (s) + 4 N O_{2} (g) + O_{2} (g)

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