This section contains assertion and reason type questions.each question has 4 choices 1,2,3 and 4 out of which only one is correct
Assertion (A) Volume occupied by 1 equivalent of `H_2` at NTP is 11.2 L
Reason {R] 1 equivalent of `H_2` =1g =0.5 mol and volume occupied by 1 mol of any gas at NTP =22.4 L

Options

A. Both assertion and reason are correct but reason is the correct explanation of assertion
B. Both assertion and reason are correct but reason isnot the correct explanation of assertion
C. Assertion is correct but reason is incorrect
D. Assertion is incorrect but reason is correct

Answer

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

### Step 1: Understand the Assertion
The assertion states that the volume occupied by 1 equivalent of \( H_2 \) at NTP (Normal Temperature and Pressure) is 11.2 L.

### Step 2: Understand the Concept of Equivalent
In chemistry, the equivalent weight of a substance is the mass of that substance that will combine with or displace 1 mole of hydrogen atoms (or 1 mole of electrons in redox reactions). For hydrogen (\( H_2 \)), 1 equivalent is equal to 1 gram.

### Step 3: Calculate Moles from Equivalent
Since 1 equivalent of \( H_2 \) is 1 gram and the molar mass of \( H_2 \) is approximately 2 g/mol, we can calculate the number of moles:
\[ \text{Moles of } H_2 = \frac{\text{Mass}}{\text{Molar Mass}} = \frac{1 \text{ g}}{2 \text{ g/mol}} = 0.5 \text{ mol} \]

### Step 4: Volume Occupied by Moles of Gas at NTP
At NTP, 1 mole of any ideal gas occupies 22.4 L. Therefore, the volume occupied by 0.5 moles of \( H_2 \) can be calculated as follows:
\[ \text{Volume} = \text{Moles} \times \text{Volume per mole} = 0.5 \text{ mol} \times 22.4 \text{ L/mol} = 11.2 \text{ L} \]

### Step 5: Analyze the Reason
The reason states that 1 equivalent of \( H_2 \) is 1 g, which is equal to 0.5 mol, and that the volume occupied by 1 mol of any gas at NTP is 22.4 L. This is indeed correct and supports the assertion.

### Conclusion
Both the assertion and reason are true, and the reason correctly explains the assertion. Therefore, the correct option is:
**Option 1: Both Assertion and Reason are true, and the Reason is the correct explanation for the Assertion.**

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