Test:Oxygen and its Preparation - JAMB MCQ

Oxygen is not prepared by reacting an acid with a metal. This reaction typically produces hydrogen gas.

Hydrogen peroxide (H₂O₂) is commonly used as an oxygen source in emergency situations. It decomposes to release oxygen gas when it comes into contact with a catalyst.

Thermal decomposition involves the breakdown of a compound by heating it. In this case, the metal oxide reacts with carbon to produce oxygen gas.

Oxygen gas is sparingly soluble in water. When it is collected over water, any dissolved oxygen will be released, ensuring that the gas collected is pure.

Ammonium nitrate (NH₄NO₃) can be heated to produce oxygen gas, nitrogen gas, and water vapor. The decomposition reaction is commonly used in the laboratory for the preparation of oxygen.

Oxygen is commercially prepared by the fractional distillation of air. This method takes advantage of the different boiling points of gases in air to separate and collect oxygen.

Reacting with metals to form oxides is a chemical property of oxygen, not a physical property.

Potassium permanganate (KMnO₄) is commonly used as an oxidizing agent because it can release oxygen in certain reactions.

Oxygen supports combustion by reacting with flammable substances, providing the necessary oxygen for the reaction to occur.

Fractional distillation is the method commonly used to separate oxygen from air in industries. It takes advantage of the different boiling points of gases in air to obtain pure oxygen.