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ICSE Class 8 Chemistry Question 4 of 5

Physical and Chemical Changes — Question 1

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Question 1

Select the correct answer from the choice in bracket to complete each sentence:

  1. A change in which a substance retains its identity is a ............... [physical/chemical] change.

  2. Matter is added or removed during a ............... [chemical/physical] change.

  3. Energy required for completion of a physical change is ............... [released/absorbed] when the change is reversed.

  4. Dissolution of lead nitrate in water is deemed as a ............... [physical/chemical] change.

  5. A change in which matter undergoes a change but the total mass of substance is unaltered is a ............... [physical/chemical] change.

Answer

  1. A change in which a substance retains its identity is a physical change.

  2. Matter is added or removed during a chemical change.

  3. Energy required for completion of a physical change is released when the change is reversed.

  4. Dissolution of lead nitrate in water is deemed as a physical change.

  5. A change in which matter undergoes a change but the total mass of substance is unaltered is a physical change.