Question

When a chemical change takes place in matter, we commonly say a chemical reaction takes place

• A. True
• B. False

Answer 1

The correct option is A True

Chemical change: It is a type of change in which there is a change in the chemical properties of the substance and a new substance is formed.

• It is a type of irreversible change
• Irreversible change: It is a type of change that cannot be reversed.
• Heat will be released or absorbed in this type of reaction.
• For example, Magnesium($\mathrm{Mg}$) when reacted with Oxygen(${\mathrm{O}}_2$) results in the production of Magnesium oxide($\mathrm{MgO}$), and energy is released in the form of light.
• $\underset{\mathrm{Magnesium}}{2\mathrm{Mg}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Magnesium}\mathrm{Oxide}}{2\mathrm{MgO}\left(\mathrm{s}\right)}+\mathrm{light}$

Therefore, the given statement is true.