Question

ASSERTION: Combustion reactions are also exothermic oxidation reactions.
REASONING: In these reactions, oxygen is added and heat energy is released.

Answer 1

A)Both assertion and reason are correct and reason is the correct explaination of assertion.

Answer 2

Both assertion and reason are correct and the reason is the correct explanation of the assertion.

• A combustion reaction is the type of chemical reaction, commonly known as "burning."
• Generally, this type of reaction involves a reaction between combustible material and an oxidiser to form an oxidised product. Energy is released when a combustion reaction takes place.
• Combustion is an oxidation reaction that gives rise to heat, and it is therefore always an exothermic reaction. Common combustion reactions sever the bonds of hydrocarbon molecules, and the resulting bond of water and carbon dioxide always releases more energy than was used to break the original bonds.
• Examples of combustion reactions are as follows:
  
  Combustion of methane
  $CH_{4} +2O_{2}$ → $CO_{2} +2H_{2}O$
  
  Burning of naphthalene
  $C_{10} H_{8} +12O_{2}$ → $10CO_{2} +4H_{2}O$

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