Question

Classify the following as chemical or physical change.​

Answer 1

Answer:

• physical change.
• physical change
• chemical change
• physical change
• chemical change
• physical change
• chemical change
• chemical change

Hope it helps.

Answer 2

Answer:

• Cutting of trees- Physical change because there are no chemical reaction are involved.

• Melting of butter in a pan- Physical change there is no change in the chemical composition of butter, only the physical state changes from solid to liquid.

• Rusting of almirah -Chemical change a new chemical compound called rust is formed.
• Boiling of water to form steam -Physical change because during this change only changer of state occurs from liquid water to steam (gaseous) without any change in its chemical composition.
• Passing of electric current... -Chemical change Water molecules can be broken down into hydrogen and oxygen molecules by a chemical reaction called electrolysis. When an electric current is passed through liquid water (H2O), it changes the water into two gases—hydrogen and oxygen.
• Dissolving common salt in water -Physical change because only the state of the matter has changed.
• Making a fruit salad with raw fruits -Physical change since there is no change in the chemical properties of the fruits but only the physical appearance has changed.
• Burning of water and wood -Chemical change because new substances are formed.

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