A chemical change may involve – (a) change in colour only (b) change in temperature only (c) evolution of gas only (d) any or all of the above

Answer: (d) any or all of the above

A chemical change results from a chemical reaction. If the chemical composition is changing, then it is known as chemical change. A chemical change may involve a change in colour, temperature, smell or evolution of gas, heat, etc.

  • The change in which the molecular composition is completely altered and a new product is formed is called a chemical change.
  • Chemical changes create a new product.
  • The changes in Chemical change are irreversible and permanent.
  • It reveals that chemical change cannot be reversed by changing or altering the experimental changes.
  • The mass of the substance is altered during a chemical change.
  • During a chemical change, the energy changes occur.
  • The reaction is called an exothermic reaction if the energy is released and as an endothermic reaction when the energy is absorbed.

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