Chemical Reactions with Magnesium and Acids

The video tutorial explains the single displacement reaction of magnesium metal with hydrochloric acid. When magnesium is added to the acid, a rapid reaction occurs, producing hydrogen gas and leaving a solution of magnesium chloride. The presence of hydrogen gas is confirmed by its flammability when exposed to a burning splint.

What type of reaction occurs when a metal reacts with an acid, as demonstrated with magnesium and hydrochloric acid?

• Synthesis reaction

• Single displacement reaction

• Decomposition reaction

• Double displacement reaction

What is produced when magnesium reacts with hydrochloric acid?

• Carbon dioxide

• Nitrogen gas

• Oxygen gas

• Hydrogen gas

What happens to the magnesium metal during the reaction with hydrochloric acid?

• It forms a precipitate

• It dissolves completely

• It remains unchanged

• It evaporates

How can the presence of hydrogen gas be confirmed in the reaction?

• By using a burning splint

• By observing a color change

• By measuring the temperature

• By using a litmus paper

What characteristic of hydrogen gas is demonstrated when a burning splint is used?

• It is heavier than air

• It is flammable

• It is odorless

• It is colorless