Is it true that some metals become dull and lose their shine (lustre) because of the action of air and moisture on their surface?

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

True

False

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The above statement is true.
The shiny appearance of any material is termed lustre. However, some metals lose their shine and become dull with time. When exposed to air, the surface of these metals reacts with the moisture in the air, and the metal loses its shine and becomes dull. This is known as corrosion. For example, the action of air and moisture on iron forms a dull layer of a compound on its surface called rust. This corrosion of iron is called rusting. So, the action of moisture and air makes a metal lose its shine and become dull.

Watch 3-min video & get full concept clarity

tricks from toppers of Infinity Learn

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

🔥 Start Your JEE/NEET Prep at Just ₹1999 / month - Limited Offer! Check Now!

Get Expert Academic Guidance – Connect with a Counselor Today!

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET