Login
Home
TOP
Send feedback
Login
Subjects
Chemistry CBSE Live product
Class 7 (2026-27)
The World of Metals and Non-metals
Effect of air and water on metals
2.
Rusting and the causes
Question:
2
m.
Pick
the suitable option based on rusting.
1.
If iron nails are exposed to humid air and rust develops, which of the following conclusions is accurate?
Rusting is a physical change
Iron nails chemically reacted with air and moisture
Iron gets melted
Rusting is a reversible change
2.
A farmer observes that his iron tools rusts more quickly during the rainy season. What is the most probable reason?
Rain water washes off the iron coating
Tools are more frequently used
Water prevents the iron tools
More moisture in the air promotes faster rusting
Login
or
Fast registration
Previous task
Exit to the topic
Next task
Send feedback
Did you find an error?
Send it to us!
