Due to which ion does sodium hydroxide show basicity in water?
Answer and explanation
Correct answer: Hydroxide ion
Sodium hydroxide is a soluble base and dissociates in water: NaOH(aq) → Na+(aq) + OH−(aq). The hydroxide ions increase the concentration of OH− in the solution and are responsible for its basic properties, such as changing indicators and neutralising acids. Sodium ions do not cause basicity, while hydrogen, carbonate, and chloride ions are not the characteristic ions released by NaOH in this process. Therefore option B is correct.
Frequently asked questions
What is the correct answer to this question?
Hydroxide ion
Why is this the correct answer?
Sodium hydroxide is a soluble base and dissociates in water: NaOH(aq) → Na+(aq) + OH−(aq). The hydroxide ions increase the concentration of OH− in the solution and are responsible for its basic properties, such as changing indicators and neutralising acids. Sodium ions do not cause basicity, while hydrogen, carbonate, and chloride ions are not the characteristic ions released by NaOH in this process. Therefore option B is correct.
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.
