In which situation will a neutralisation reaction certainly occur?
Answer and explanation
Correct answer: Mixing hydrochloric acid and sodium hydroxide
Neutralisation is the reaction of an acid with a base, usually producing salt and water. Hydrochloric acid supplies H⁺ ions and sodium hydroxide supplies OH⁻ ions; they combine as H⁺ + OH⁻ → H₂O, while Na⁺ and Cl⁻ form sodium chloride: HCl + NaOH → NaCl + H₂O. Mixing salt, sand, or sugar with water is dissolution or suspension, not an acid-base reaction. Thus A is certain.
Frequently asked questions
What is the correct answer to this question?
Mixing hydrochloric acid and sodium hydroxide
Why is this the correct answer?
Neutralisation is the reaction of an acid with a base, usually producing salt and water. Hydrochloric acid supplies H⁺ ions and sodium hydroxide supplies OH⁻ ions; they combine as H⁺ + OH⁻ → H₂O, while Na⁺ and Cl⁻ form sodium chloride: HCl + NaOH → NaCl + H₂O. Mixing salt, sand, or sugar with water is dissolution or suspension, not an acid-base reaction. Thus A is certain.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
