Freezing point of water is `0^(@)C` at ______

Options

A. 76 cm of Hg
B. 760 cm of Hg
C. 76 mm of Hg
D. 7.6 mm of Hg

Explanation

To answer the question "Freezing point of water is `0^(@)C` at ______", we need to determine the pressure at which the freezing point of water is `0^(@)C`. Here’s a step-by-step solution:

### Step 1: Understand the Freezing Point of Water
The freezing point of water is the temperature at which it changes from liquid to solid. Under standard conditions, this is `0^(@)C`.

### Step 2: Identify Standard Pressure
The freezing point of water can vary with pressure. However, at standard atmospheric pressure, which is defined as `760 mm of Hg`, the freezing point of water remains at `0^(@)C`.

### Step 3: Convert Pressure Units
The question may provide options in different units. Since `760 mm of Hg` can also be expressed in centimeters, we convert it:
- `760 mm of Hg` is equivalent to `76 cm of Hg` (since 1 cm = 10 mm).

### Step 4: Match with Given Options
Now, we need to look for the option that states `76 cm of Hg`. This will be the correct answer to the question.

### Final Answer
The freezing point of water is `0^(@)C` at `76 cm of Hg`.

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