Redox: Gain and lose oxygen

What is oxidation reaction?

• Reaction where oxygen is gain

• Reaction where oxygen is loss

• Combustion of carbon

• Reactions that involves both gain and loss of oxygen

What is reduction reaction?

• Reaction where oxygen is gain

• Reaction where oxygen is loss

• Decomposition of hydrogen peroxide

• Reactions that involves both gain and loss of oxygen

What is redox reaction?

• Reaction where oxygen is gain

• Reaction where oxygen is loss

• Displacement reaction

• Reactions that involves both gain and loss of oxygen

The diagram show an example of redox reaction.

Which of the following chemical undergo oxidation?

• CuO

• H₂

• Cu

• H₂O

How do we know hydrogen (H₂) undergo oxidation?

• It have no oxygen

• After the reaction, it gain oxygen

• It have oxygen

• After the reaction, it lose oxygen

Which of the following chemical undergo reduction?

• CuO

• H₂

• Cu

• H₂O

How do we know copper oxide (CuO) undergo reduction?

• It have no oxygen

• After the reaction, it gain oxygen

• It have oxygen

• After the reaction, it lose oxygen

The diagram show an example of redox reaction.

Which of the following chemical undergo oxidation?

• CuO

• C

• Cu

• CO₂

The diagram show an example of redox reaction.

Which of the following chemical undergo reduction?

• CuO

• C

• Cu

• CO₂

A chemical reaction is known to produce oxygen gas.

How do we test for the gas?

• Burning splint

• Glowing splint

• Flame

• Ember