Which pair will mainly form salt and water, but gas is not necessarily formed?
Answer and explanation
Correct answer: Acid and base
An acid-base reaction is called neutralisation. In a typical neutralisation, hydrogen ions from the acid combine with hydroxide ions from the base to form water, while the remaining ions form a salt; for example, HCl + NaOH → NaCl + H₂O. Thus option C is correct. Acid with a metal commonly releases hydrogen, and acid with a carbonate or hydrogencarbonate releases carbon dioxide, so those pairs can produce gas.
Frequently asked questions
What is the correct answer to this question?
Acid and base
Why is this the correct answer?
An acid-base reaction is called neutralisation. In a typical neutralisation, hydrogen ions from the acid combine with hydroxide ions from the base to form water, while the remaining ions form a salt; for example, HCl + NaOH → NaCl + H₂O. Thus option C is correct. Acid with a metal commonly releases hydrogen, and acid with a carbonate or hydrogencarbonate releases carbon dioxide, so those pairs can produce gas.
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.
