The video tutorial demonstrates a lab activity to observe the chemical reaction between copper sulphate solution and an iron nail. It outlines the materials required, the step-by-step procedure, and the observations made during the experiment. The blue copper sulphate solution turns green due to the formation of iron sulphate, and a brown copper layer forms on the iron nail.

What is the main objective of the lab activity?

• To find the melting point of copper sulphate.

• To observe the changes in copper sulphate solution and an iron nail when they react.

• To measure the temperature change during the reaction.

• To determine the pH level of the solution.

Which of the following materials is NOT required for the lab activity?

• Glass tumblers

• Copper sulphate crystals

• Sulfuric acid

• Sodium chloride

What is the first step in the procedure of the lab activity?

• Put an iron nail in the solution.

• Fill a glass tumbler up to half with water.

• Observe the changes in the mixture.

• Add a few drops of sulfuric acid to the copper sulphate solution.

How long should the iron nail be kept undisturbed in the solution?

• 1 hour

• 30 minutes

• 2 hours

• 15 minutes

What color does the copper sulphate solution change to after the reaction?

• Green

• Yellow

• Blue

• Red

What is the new substance formed in the solution after the reaction?

• Copper nitrate

• Copper oxide

• Iron sulphate

• Iron chloride

What is the brown color deposited on the iron nail?

• Iron sulphate

• Copper

• Iron oxide

• Sulfur