Which of the following is mixed with iron to make it rust-proof?
Carbon
Nickel
Chromium
All of them
Match the Columns
Argon, neon, helium
Silver, gold and platinum
Non-metal used in the preparation of ammonia
The non-metal that is liquid in state
Reacts vigorously with cold water
Inert gases
Noble Metals
Nitrogen
Bromine
Sodium