Ratio in hydrogen and oxygen in water molecule by volume is

Options

A. `2:1`
B. `3:1`
C. `1:2`
D. `1:1`

Answer

To find the ratio of hydrogen to oxygen in a water molecule by volume, we can follow these steps:

### Step 1: Understand the composition of water
Water (H₂O) is composed of hydrogen and oxygen. Each molecule of water contains two hydrogen atoms and one oxygen atom.

### Step 2: Determine the volume ratio of hydrogen to oxygen
In terms of volume, gases can be compared based on the number of molecules. According to Avogadro's law, equal volumes of gases at the same temperature and pressure contain an equal number of molecules.

### Step 3: Calculate the volume of hydrogen and oxygen
- For every 1 molecule of water (H₂O), there are 2 molecules of hydrogen (H₂) and 1 molecule of oxygen (O₂).
- Therefore, the volume ratio of hydrogen to oxygen is based on the number of molecules:
- Volume of H₂ = 2 (for 2 hydrogen atoms)
- Volume of O₂ = 1 (for 1 oxygen atom)

### Step 4: Write the ratio
The volume ratio of hydrogen to oxygen in water is:
\[ \text{Volume ratio of H to O} = 2 : 1 \]

### Step 5: Conclusion
Thus, the ratio of hydrogen to oxygen in a water molecule by volume is 2:1.

### Final Answer
The required answer is 2:1.

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