Why does magnesium ribbon produce bubbles while reacting with dilute acid?
Answer and explanation
Correct answer: Hydrogen gas is evolved
The governing concept is the displacement reaction between an active metal and a dilute acid. Magnesium is above hydrogen in the reactivity series, so it displaces hydrogen from the acid. The general reaction is magnesium + dilute hydrochloric acid → magnesium chloride + hydrogen, or Mg + 2HCl → MgCl2 + H2. The released hydrogen forms visible bubbles. Oxygen, nitrogen, and chlorine are not the expected products.
Frequently asked questions
What is the correct answer to this question?
Hydrogen gas is evolved
Why is this the correct answer?
The governing concept is the displacement reaction between an active metal and a dilute acid. Magnesium is above hydrogen in the reactivity series, so it displaces hydrogen from the acid. The general reaction is magnesium + dilute hydrochloric acid → magnesium chloride + hydrogen, or Mg + 2HCl → MgCl2 + H2. The released hydrogen forms visible bubbles. Oxygen, nitrogen, and chlorine are not the expected products.
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.
