Question

combustion of coal is an example of
1 combination reaction
2 decomposition reaction
3 displacement reaction
4 double displacement reaction

Answer 1

Answer:

Combustion of coal is an example of combination reaction .

Therefore , option (a) is correct.

Explanation:

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Answer 2

Explanation:

Combustion of coal is an example of combination reaction.

Coal burns in air to form carbon dioxide.

Additional information :-

Types of chemical reaction :-

• Combination reaction -

Those reaction in which two or more substances combined to form a single substance, are called combination reaction.

Example -

C + O2 → CO2

• Decomposition reaction -

Those reaction in which a compound splits up into two or more simpler substances are known as decomposition reaction.

Example -

CaCO3 → CaO + CO2

• Displacement reaction -

Those reaction in which one element takes the place of another element in a compound, are known as Displacement reaction.

Example -

CuSO4 + Zn → ZnSO4 + Cu

• Double Displacement reaction -

Those reaction in which two compounds react by an exchange of ions to form two new compounds are called double displacement reaction.

Example -

AgNO3 + NaCl → AgCl + NaNO3