Which of the following conversions is correct ?

Options

A. 1 atm `=1.01xx10^(4)` Pa
B. 1 mm of Hg =133 Pa
C. 1 bar `=10^(7)` Pa
D. 1 torr =`10^(2)` Pa

Explanation

To solve the question regarding the correct conversions of pressure units, we will analyze each conversion provided in the question step by step.

### Step 1: Analyze the conversion of 1 atmosphere
1. **Conversion Statement**: 1 atmosphere = 1.01 × 10^4 Pascal
2. **Correct Value**: 1 atmosphere = 1.01 × 10^5 Pascal
3. **Conclusion**: This conversion is incorrect.

### Step 2: Analyze the conversion of 1 millimeter of mercury
1. **Conversion Statement**: 1 millimeter of mercury = 133 Pascal
2. **Correct Value**: 1 millimeter of mercury = 133.322 Pascal (approximately 133 Pascal is often used for simplicity)
3. **Conclusion**: This conversion is generally accepted as correct.

### Step 3: Analyze the conversion of 1 bar
1. **Conversion Statement**: 1 bar = 10^7 Pascal
2. **Correct Value**: 1 bar = 10^5 Pascal
3. **Conclusion**: This conversion is incorrect.

### Step 4: Analyze the conversion of 1 torr
1. **Conversion Statement**: 1 torr = 10^2 Pascal
2. **Correct Value**: 1 torr = 133.322 Pascal (approximately 133.3 Pascal)
3. **Conclusion**: This conversion is incorrect.

### Final Conclusion
After analyzing all the conversions, we find that:
- The conversion for 1 atmosphere is incorrect.
- The conversion for 1 millimeter of mercury is generally accepted as correct.
- The conversion for 1 bar is incorrect.
- The conversion for 1 torr is incorrect.

Thus, the only correct conversion from the options given is for 1 millimeter of mercury.

### Answer:
The correct conversion is: 1 millimeter of mercury = 133 Pascal (approximately).

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