Which ion do bases give when dissolved in water?
Answer and explanation
Correct answer: Hydroxide ion
By the Arrhenius definition, a base produces hydroxide ions, OH⁻, when it dissolves or dissociates in water. For example, sodium hydroxide separates as NaOH → Na⁺ + OH⁻. Therefore option B is correct. Hydrogen ions indicate acidity, whereas chloride and nitrate ions may occur in particular salts but are not the defining ions of all bases.
Frequently asked questions
What is the correct answer to this question?
Hydroxide ion
Why is this the correct answer?
By the Arrhenius definition, a base produces hydroxide ions, OH⁻, when it dissolves or dissociates in water. For example, sodium hydroxide separates as NaOH → Na⁺ + OH⁻. Therefore option B is correct. Hydrogen ions indicate acidity, whereas chloride and nitrate ions may occur in particular salts but are not the defining ions of all bases.
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.
