Which of the following metals acts as a sacrificial anode for iron articles?

Sacrificial anode protects iron of ships, underground pipelines etc. from rusting, a process known as cathodic protection. Which one of the following metals cannot be used as a sacrificial anode ?

Which of the following metals is used in galvanisation of iron?

Which of the following metal ions cannot act as an electrophile?

Which of the following is anodic reaction.

Which of the following is not an anode reaction ?

Which of the following methods is suitable for preventing an iron article from rusting ? Applying grease Applying paint Coating Zinc keep the article in water

Which of the following metals can be used for making wires? Iron