If an aqueous solution of a substance tastes sour and turns blue litmus red, which category does it belong to?
Answer and explanation
Correct answer: Acid
An acid produces hydrogen ions, or hydronium ions in water, and commonly has a sour character. It changes blue litmus paper to red because the indicator responds to the acidic medium. Thus option A is correct. A base generally turns red litmus blue, a metal is a broad class of element rather than the indicated solution category, and a neutral gas does not explain both observations. In practice, chemicals must never be tasted; the statement describes properties only.
Frequently asked questions
What is the correct answer to this question?
Acid
Why is this the correct answer?
An acid produces hydrogen ions, or hydronium ions in water, and commonly has a sour character. It changes blue litmus paper to red because the indicator responds to the acidic medium. Thus option A is correct. A base generally turns red litmus blue, a metal is a broad class of element rather than the indicated solution category, and a neutral gas does not explain both observations. In practice, chemicals must never be tasted; the statement describes properties only.
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.
