Test 1

Which one is a physical change?

• Rusting of iron

• Melting of ice

• Burning of paper

• Cooking food

Rusting of iron is a.... change

• Physical

• Reversible

• Chemical

• Periodic

Blowing of balloon is a.....

• Physical and fast change

• Chemical and slow change

• Physical and slow change

• Chemical and fast change

Photosynthesis is a

• Combination process

• Physical change

• Undesirable change

• Chemical change

The change in which no new substance is formed is called

• Chemical change

• Periodic change

• Physical change

• Non periodic change

Which of the following is /are permanent change?

• Cooking of food

• Ripening of oranges

• Rusting of iron

• All the above

Which of the following changes are reversed?

• Raw egg to boiled egg

• Wet clothes to dry clothes

• Bud to flower

• Cow dung to biogas

Which of the following changes are reversed?

• Raw egg to boiled egg

• Wet clothes to dry clothes

• Bud to flower

• Cow dung to biogas