An example of combination reaction is

C a O + H_{2} O \to C a (O H)_{2}

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C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O

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C u O + H_{2} \to C u + H_{2} O

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Solution

The correct option is A
$C a O + H_{2} O \to C a (O H)_{2}$
A reaction in which a single product is formed from two or more reactants is known as a combination reaction. In the following reaction, calcium oxide and water combine to form a single product, calcium hydroxide.

$C a O + H_{2} O \to C a (O H)_{2}$

Hence, the correct answer is option (a).

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Question 3

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

An example of combination reaction between an element and compound is:

An example of combination reaction between two elements is:

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