Chemical equation can indicate the time taken by the reaction.

Answer

### Step-by-Step Solution

1. **Understanding the Statement**: The question states that a chemical equation can indicate the time taken by a reaction. We need to evaluate this statement.

2. **Definition of a Chemical Equation**: A chemical equation represents the reactants and products involved in a chemical reaction. It shows what substances are reacting and what substances are formed.

3. **Limitations of a Chemical Equation**: While a chemical equation provides information about:
- The reactants (substances that undergo the reaction)
- The products (substances formed as a result of the reaction)
- The conditions of the reaction (such as temperature and pressure)
- The presence of a catalyst (if any)

It does **not** provide information about the time taken for the reaction to occur.

4. **Rate of Reaction**: The time taken for a reaction to occur is related to the rate of reaction. The rate of reaction is determined by various factors such as concentration, temperature, and presence of a catalyst. This information cannot be derived from the chemical equation alone.

5. **Conclusion**: Therefore, the statement that a chemical equation can indicate the time taken by the reaction is **incorrect**.

### Final Answer
No, a chemical equation cannot indicate the time taken by the reaction.

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