Which salt is formed when calcium hydroxide reacts with hydrochloric acid?
Answer and explanation
Correct answer: Calcium chloride
This is an acid-base neutralisation reaction. Hydrochloric acid provides chloride ions, and calcium hydroxide provides calcium ions and hydroxide ions. The balanced equation is Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O, so calcium chloride is the salt formed. Calcium carbonate would require carbonate ions, whereas sodium and magnesium are not present among the reactants. Therefore, option A is the only chemically consistent answer.
Frequently asked questions
What is the correct answer to this question?
Calcium chloride
Why is this the correct answer?
This is an acid-base neutralisation reaction. Hydrochloric acid provides chloride ions, and calcium hydroxide provides calcium ions and hydroxide ions. The balanced equation is Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O, so calcium chloride is the salt formed. Calcium carbonate would require carbonate ions, whereas sodium and magnesium are not present among the reactants. Therefore, option A is the only chemically consistent answer.
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.
