A metal and an acid react to form a salt and hydrogen gas. If the metal is magnesium and the acid is sulphuric acid, which salt will be formed?
Answer and explanation
Correct answer: Magnesium sulphate
The governing pattern is metal plus acid producing a salt and hydrogen. Sulphuric acid supplies the sulphate ion, SO₄²⁻, while magnesium forms Mg²⁺ ions. Combining these ions in a 1:1 ratio gives MgSO₄, magnesium sulphate. The balanced reaction is Mg + H₂SO₄ → MgSO₄ + H₂, so option B is correct; chloride, sodium, and carbonate ions are not supplied by the reactants.
Frequently asked questions
What is the correct answer to this question?
Magnesium sulphate
Why is this the correct answer?
The governing pattern is metal plus acid producing a salt and hydrogen. Sulphuric acid supplies the sulphate ion, SO₄²⁻, while magnesium forms Mg²⁺ ions. Combining these ions in a 1:1 ratio gives MgSO₄, magnesium sulphate. The balanced reaction is Mg + H₂SO₄ → MgSO₄ + H₂, so option B is correct; chloride, sodium, and carbonate ions are not supplied by the reactants.
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.
