One solution turns red litmus blue and another turns blue litmus red. What will be the main products when they are mixed?
Answer and explanation
Correct answer: Salt and water
The governing concept is acid-base identification followed by neutralisation. A solution that turns red litmus blue is basic, while one that turns blue litmus red is acidic. When suitable amounts of an acid and a base react, hydrogen ions combine with hydroxide ions to form water, and the remaining ions form a salt: H+ + OH− → H2O. Thus option A is correct; the other products are unsupported.
Frequently asked questions
What is the correct answer to this question?
Salt and water
Why is this the correct answer?
The governing concept is acid-base identification followed by neutralisation. A solution that turns red litmus blue is basic, while one that turns blue litmus red is acidic. When suitable amounts of an acid and a base react, hydrogen ions combine with hydroxide ions to form water, and the remaining ions form a salt: H+ + OH− → H2O. Thus option A is correct; the other products are unsupported.
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.
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