A solution turns red litmus blue and feels soapy to touch. Which ions give it basic properties?
Answer and explanation
Correct answer: Hydroxide ions
A solution that turns red litmus blue is basic, and a slippery or soapy feel is another common indication of basicity. In aqueous chemistry, bases furnish hydroxide ions, OH⁻, either directly or through reactions with water. These ions are responsible for the characteristic basic properties. Thus option A is correct. Hydrogen ions are associated with acids, while chloride and sulphate ions are spectator ions in many common solutions and do not by themselves explain the observation.
Frequently asked questions
What is the correct answer to this question?
Hydroxide ions
Why is this the correct answer?
A solution that turns red litmus blue is basic, and a slippery or soapy feel is another common indication of basicity. In aqueous chemistry, bases furnish hydroxide ions, OH⁻, either directly or through reactions with water. These ions are responsible for the characteristic basic properties. Thus option A is correct. Hydrogen ions are associated with acids, while chloride and sulphate ions are spectator ions in many common solutions and do not by themselves explain the observation.
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.
