How does sodium chloride form in the reaction of hydrochloric acid and sodium hydroxide?
Answer and explanation
Correct answer: Sodium ion combines with chloride ion
The governing concept is neutralisation and ionic exchange. In water, HCl provides H⁺ and Cl⁻ ions, while NaOH provides Na⁺ and OH⁻ ions. H⁺ combines with OH⁻ to form water, and the remaining Na⁺ and Cl⁻ ions form sodium chloride: HCl + NaOH → NaCl + H₂O. Therefore option A is correct; the other pairings do not describe this reaction.
Frequently asked questions
What is the correct answer to this question?
Sodium ion combines with chloride ion
Why is this the correct answer?
The governing concept is neutralisation and ionic exchange. In water, HCl provides H⁺ and Cl⁻ ions, while NaOH provides Na⁺ and OH⁻ ions. H⁺ combines with OH⁻ to form water, and the remaining Na⁺ and Cl⁻ ions form sodium chloride: HCl + NaOH → NaCl + H₂O. Therefore option A is correct; the other pairings do not describe this reaction.
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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