Which of the following types of reactions is a neutralisation reaction?

Correct option is B

The correct answer is (b) Double displacement

Explanation:

• A neutralisation reaction occurs when an acid reacts with a base to produce salt and water.

• A common example is:
HCl (aq) + NaOH (aq) → NaCl (aq) + H₂O (l)

• In this reaction, the ions exchange their partners. The hydrogen ion (H⁺) from the acid combines with the hydroxide ion (OH⁻) from the base to form water (H₂O).

• At the same time, the sodium ion (Na⁺) combines with the chloride ion (Cl⁻) to form sodium chloride (NaCl).

• Since the ions of two compounds exchange with each other, the reaction is classified as a double displacement reaction.

Information Booster:

• Most neutralisation reactions are exothermic, meaning they release heat during the reaction.

• These reactions are useful in daily life, such as antacids neutralising excess stomach acid and treating acidic soil in agriculture.

Additional Knowledge:

Single displacement (Option a)
• In this type of reaction, a more reactive element displaces a less reactive element from its compound.
Example: Fe + CuSO₄ → FeSO₄ + Cu

Decomposition (Option c)
• In this reaction, one compound breaks down into two or more simpler substances.

Combustion (Option d)
• This reaction occurs when a substance reacts rapidly with oxygen, producing heat and light.