Indicate the types of chemical reactions represented by the following equations:
$2 Zn (s) + O_{2} (g) \overset{heat}{\to} 2 ZnO (s)$

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Solution

1. Type of reaction

Combination reaction: Reaction in which two or more reactants combine to form a single product. $A + B \to C$
Decomposition reaction: Reaction in which reactant is broken down into two or more products in the presence of heat, light or electricity. $A \to B + C$
Displacement reaction: Reaction in which one of the higher reactive element displaces a less reactive element from its solution. $A + BC \to AC + B$ ( Here A is more reactive than B)
Double displacement reaction: Reaction in which ions of both the reactants interchange their place and form new compounds. $AB + CD \to AD + CB$

2. Reaction:
$2 Zn (s) + O_{2} (g) \overset{heat}{\to} 2 ZnO (s)$
Zinc Oxygen Zinc oxide
Here zinc heated in presence of oxygen and formation of zinc oxide takes place due to combination.
That means it is a combination reaction because two reactants are combining and forming a single product.

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Indicate the types of chemical reactions represented by the following equations:2Zn(s)+O2(g)→heat2ZnO(s)

Indicate the types of chemical reactions represented by the following equations:
$2 Zn (s) + O_{2} (g) \overset{heat}{\to} 2 ZnO (s)$