A salt solution turns blue litmus red. From what type of acid and base could this salt be formed?
Answer and explanation
Correct answer: Strong acid and weak base
Blue litmus turning red shows that the salt solution is acidic. A salt formed from a strong acid and a weak base, such as ammonium chloride from HCl and NH₄OH, undergoes hydrolysis in water and produces relatively more H₃O⁺ ions. Therefore option A is the suitable combination. A weak acid–strong base salt is generally basic, while a strong acid–strong base salt is approximately neutral.
Frequently asked questions
What is the correct answer to this question?
Strong acid and weak base
Why is this the correct answer?
Blue litmus turning red shows that the salt solution is acidic. A salt formed from a strong acid and a weak base, such as ammonium chloride from HCl and NH₄OH, undergoes hydrolysis in water and produces relatively more H₃O⁺ ions. Therefore option A is the suitable combination. A weak acid–strong base salt is generally basic, while a strong acid–strong base salt is approximately neutral.
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.
