7class - science - Changes around us test 2

Name

Atmospheric pollution

• Slow change
• Due to chemical change
• Physical change
• The process of depositing one metal on another metal

Galvanisation

• Slow change

• Due to chemical change

• Physical change

• The process of depositing one metal on another metal

Galvanisation

• Slow change

• Physical change

• Due to chemical change

• The process of depositing one metal on another metal

This metal is used as protective layer to prevent rusting in the process of galvanisation

• Nickel
• Copper
• Chromium
• Zinc

A + B <--> C + D Which type of reaction is this?

• Reversibe
• Irriversible
• Forwardq
• Backward

Burning of camphor is similar to

• breaking of glass

• burnng of wood and magnesium

• burning of magnesium

• burning of wood

Rust is

• Iron Oxide
• Oxygen
• Water
• Iron

Depositing one metal on another metal is

• Physical Change
• Galvanisation
• Rusting
• No answer

Which metal is generally used for galvanisation?

• Magnesium
• Aluminium
• Zinc
• Iron