Engineering Board Exam Reviewer · Chemistry · easy

In cathodic protection by a sacrificial anode, the anode is made of a metal that is:

1. Less active than the protected metal
2. More active (more easily oxidized) than the protected metal
3. Identical to the protected metal
4. A noble metal such as gold

Answer

B. More active (more easily oxidized) than the protected metal

Solution

Magnesium and zinc are commonly used to protect steel structures and pipelines.

More Chemistry questions

1. The process of coating iron with zinc to prevent corrosion is called:
2. The value of the Faraday constant is approximately:
3. A galvanic (voltaic) cell converts:
4. The movement of solvent through a semipermeable membrane from a dilute to a concentrated solution is called:
5. Adding salt to water causes its boiling point to:
6. A solution that contains the maximum amount of solute that can be dissolved at a given temperature is:
7. Molarity is defined as:
8. Litmus paper turns red in a/an:
9. Which of the following is a strong base?
10. Which of the following is a strong acid?

All Chemistry Reviewer questions