Question

Given below are two statements: 
Statement (I): Corrosion is an electrochemical phenomenon in which pure metal acts as an anode and impure metal as a cathode.
Statement (II): The rate of corrosion is more in alkaline medium than in acidic medium.
 In the light of the above statements, choose the correct answer from the options given below:

• A. Both Statement I and Statement II are false
• B. Statement I is true but Statement II is false
• C. Both Statement I and Statement II are true
• D. Statement I is false but Statement II is true

Hint:

Remember that in corrosion, the metal acts as an anode (loses electrons) and the impure metal acts as the cathode (gains electrons). Also, corrosion is faster in acidic mediums due to higher ionic activity.

Answer 1

The Correct Option is D

Step 1: Statement I is false. Corrosion occurs when the metal acts as the anode and the impure metal acts as the cathode. Statement I incorrectly assigns these roles.

Step 2: Statement II is true. Acidic environments accelerate corrosion due to higher ion concentrations that speed up electrochemical reactions. Alkaline environments exhibit slower corrosion rates because of lower ion concentrations.