Classify the following as chemical or physical changes
burning of paper and wood.

Classify the following as chemical or physical changes cutting of trees.

Classify the following as chemical or physical changes rusting of almirah.

Classify the following as chemical or physical changes boiling of water to form steam.

Classify the following as chemical or physical changes melting of butter in a pan.

Classify the following as chemical or physical changes making a fruit salad with raw fruits.

Classify the following as chemical or physical changes dissolving common salt in water.

Classify the following as chemical or physical changes passing of electric current, through water and the water breaking down into hydrogen and oxygen gases.

Define physical change.

Classify the following amines as primary, secondary or tertiary: