A salt solution turns red litmus blue. It may be formed from which type of acid and base?
Answer and explanation
Correct answer: Weak acid and strong base
The governing concept is the hydrolysis and nature of salts. A salt produced from a weak acid and a strong base generally gives a basic solution because the conjugate base of the weak acid reacts with water to produce hydroxide ions. This turns red litmus blue, so option B is correct. Strong acid–weak base salts are usually acidic, strong–strong salts are approximately neutral, and acid plus water is not a salt-forming combination.
Frequently asked questions
What is the correct answer to this question?
Weak acid and strong base
Why is this the correct answer?
The governing concept is the hydrolysis and nature of salts. A salt produced from a weak acid and a strong base generally gives a basic solution because the conjugate base of the weak acid reacts with water to produce hydroxide ions. This turns red litmus blue, so option B is correct. Strong acid–weak base salts are usually acidic, strong–strong salts are approximately neutral, and acid plus water is not a salt-forming combination.
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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
