Assertion : The reaction is which a substance is decomposed into two or more simple substances is known as decomposition reaction.
Reason: The decomposition can be carried out by giving energy in the form of heat, light, electricity, etc.

Options

A. If both assertion and reason are time and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**:
- The assertion states that a reaction in which a substance is decomposed into two or more simple substances is known as a decomposition reaction.
- This is correct as a decomposition reaction involves breaking down a compound into simpler products.

2. **Understanding the Reason**:
- The reason provided explains that decomposition can be facilitated by supplying energy in various forms such as heat, light, or electricity.
- This is also true because many decomposition reactions require an input of energy to occur. For example, heating calcium carbonate (CaCO₃) decomposes it into calcium oxide (CaO) and carbon dioxide (CO₂).

3. **Conclusion**:
- Both the assertion and the reason are correct.
- Furthermore, the reason correctly explains why the assertion is true, as energy is often needed to initiate decomposition reactions.

**Final Statement**:
- Therefore, both the assertion and the reason are true, and the reason correctly supports the assertion.

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