A: One mole of sucrose-reacts completely with oxygen produces 268.8 litre of carbon dioxide at STP.
R: Amount of oxygen required for reaction is 268.8 litre.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion
C. If Assertion is true statement but Reason is false
D. If both Assertion and Reason are false statements

Answer

To solve the question, we will analyze both the assertion and the reason step by step.

### Step 1: Understanding the Assertion
The assertion states that one mole of sucrose reacts completely with oxygen to produce 268.8 liters of carbon dioxide at STP (Standard Temperature and Pressure).

- **Chemical Reaction**: The balanced chemical equation for the combustion of sucrose (C₁₂H₂₂O₁₁) can be written as:
\[ C_{12}H_{22}O_{11} + O_2 \rightarrow CO_2 + H_2O \]
- **Balancing the Equation**: The balanced equation is:
\[ C_{12}H_{22}O_{11} + 12 O_2 \rightarrow 12 CO_2 + 11 H_2O \]
This indicates that 1 mole of sucrose produces 12 moles of carbon dioxide.

### Step 2: Calculating Volume of Carbon Dioxide
At STP, 1 mole of any gas occupies 22.4 liters. Therefore, the volume of 12 moles of carbon dioxide can be calculated as follows:
\[ \text{Volume of } CO_2 = \text{Number of moles} \times \text{Volume per mole at STP} = 12 \text{ moles} \times 22.4 \text{ L/mole} = 268.8 \text{ L} \]
Thus, the assertion is correct.

### Step 3: Understanding the Reason
The reason states that the amount of oxygen required for the reaction is 268.8 liters.

- From the balanced equation, we see that 1 mole of sucrose requires 12 moles of oxygen.
- Therefore, the volume of oxygen required can be calculated as:
\[ \text{Volume of } O_2 = 12 \text{ moles} \times 22.4 \text{ L/mole} = 268.8 \text{ L} \]
This means the reason is also correct.

### Step 4: Analyzing the Relationship
While both the assertion and the reason are true, the reason does not provide a correct explanation for the assertion. The assertion discusses the production of carbon dioxide, while the reason merely states the volume of oxygen without connecting it to the stoichiometry of the reaction.

### Conclusion
Both the assertion and the reason are true, but the reason is not the correct explanation for the assertion. Therefore, the answer to the question is that both statements are true, but the reason is not the correct explanation of the assertion.

### Final Answer
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

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