The value of the reaction quotient before any reaction occurs is

Options

A. `oo`
B. `-1`
C. 0
D. 1

Answer

To solve the question regarding the value of the reaction quotient (Q) before any reaction occurs, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Reaction Quotient (Q)**:
- The reaction quotient (Q) is a measure of the relative amounts of products and reactants present in a reaction at a given point in time. It is calculated using the concentrations (or partial pressures) of the reactants and products.

2. **Initial State of the Reaction**:
- Before any reaction occurs, the system has not yet reached a state of equilibrium, and there are no products formed. Therefore, the concentrations of the products are zero.

3. **Calculating Q**:
- The formula for the reaction quotient Q is given by:
\[ Q = \frac{[\text{Products}]}{[\text{Reactants}]} \]
- Since the concentration of products is zero at the very beginning (before any reaction occurs), we can substitute this into the formula.

4. **Substituting Values**:
- If the concentration of products is zero, then:
\[ Q = \frac{0}{[\text{Reactants}]} = 0 \]

5. **Conclusion**:
- Therefore, the value of the reaction quotient before any reaction occurs is **0**.

### Final Answer:
The value of the reaction quotient (Q) before any reaction occurs is **0**.

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