IIT-JEE & NEET LEVEL - 11 (6-0)

What element rusts?

• carbon

• manganese

• iron

• potassium

What environmental element assists rusting?

• nitrogen

• oxygen

• carbon

• hydrogen

A rusting bicycle

• physical change

• chemical change

What two things cause Iron to Rust ?

• Air and Oxygen

• Water and Carbon dioxide

• Oxygen and Water

• Carbon dioxide and Air

What is the chemical name given to Rust ?

• Iron dioxide

• Iron oxide

• Steel oxide

• Carbon dioxide

What prevents Rusting

• Painting , Oiling , Galvinising

• Washing with water

Raising the temperature of a chemical reaction would make the reaction __________________.

• happen slower

• stop completely

• happen faster

• proceed as normal

Which type of metal doesn't rust at all?

• steel
• iron
• copper

In which tube will the nail go rusty?

• The nail in tube A will go rusty.

• The nail in tube B will go rusty.

• The nail in tube C will go rusty.

burning wood is ........... change

• Reversible

• Irreversible