C2.6 The Transition elements

Which of the following is an example of a slow corrosion process?

• Copper reacting with oxygen

• Iron rusting with oxygen and water

• Sodium reacting with water

• Magnesium burning in air

What is the state of copper in the reaction with oxygen?

• Liquid

• Gas

• Solid

• Aqueous

What is the state of oxygen in the reaction with copper?

• Solid

• Liquid

• Gas

• Plasma

What color is nickel(II) carbonate?

• Blue

• Pale green

• Red

• Yellow

What is the charge on the copper ion in copper(II) sulfate?

• 1+

• 2+

• 3+

• 4+

What is the charge on the Cu+ ion?

• +1

• +2

• +3

• -1

Which transition metal is shown in the image with a blue solution?

• Iron

• Copper

• Zinc

• Silver

What is the chemical formula for iron ions with a +3 charge?

• Fe+

• Fe2+

• Fe3+

• Fe4+

What is the main function of catalysts in the chemical industry?

• To slow down reactions

• To change the color of products

• To speed up reactions

• To increase product weight