Question

1. Harry observes that his bicycle chain has started to rust, so he asks his friend Hari for suggestions. Hari

tells Harry that he can apply grease on the chain from time to time to prevent rusting.

a. Explain how applying grease can prevent rusting?

b. Which are the two essential conditions needed for rusting ?​

Answer 1

Answer:

a) A bicycle chain needs lubricant to overcome mechanical resistance, prevent rust and wear, and keep your drivetrain in tip-top condition. If not used properly, the same lubricating compounds designed to protect and enhance drivetrain performance are inherently at odds with the very purpose for which they were created.

b) The two essential conditions of rusting iron are the presence of oxygen, and the presence of water whose pH level is slightly acidic.

Explanation:

grease coating prevents rusting because it blocks the oxygen and water to get in contact with the metal