Which ions combine to form water during neutralisation?
Answer and explanation
Correct answer: Hydrogen ion and hydroxide ion
During neutralisation, an acid supplies hydrogen ions, H⁺, and a base supplies hydroxide ions, OH⁻. These ions combine in a 1:1 ratio according to H⁺ + OH⁻ → H₂O, producing water. Therefore, option B is correct. Sodium and chloride ions can form sodium chloride, but they do not form water; the other ion pairs are unrelated to the water-forming step.
Frequently asked questions
What is the correct answer to this question?
Hydrogen ion and hydroxide ion
Why is this the correct answer?
During neutralisation, an acid supplies hydrogen ions, H⁺, and a base supplies hydroxide ions, OH⁻. These ions combine in a 1:1 ratio according to H⁺ + OH⁻ → H₂O, producing water. Therefore, option B is correct. Sodium and chloride ions can form sodium chloride, but they do not form water; the other ion pairs are unrelated to the water-forming step.
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.
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