Which of the following statements are wrongs?

Options

A. `1.6 g` of a hydrocarbon on combustion in excess of oxygen produces 1.2 of `CO_(2)` and 0.4 of `H_(2) O`. The data illustrates the law of conservation of mass.
B. The product of atomic mass and specific heat of any element is a constant and is approximately 6.4. Thus is known as Dulong Petit's law.
C. The atomic masses of any elements is fractional because they are mixtures of allotropes.
D. The best standard of atomic mass is hydrogen - 1.008`

Explanation

To solve the question regarding which statements are wrong, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1**: "1.6 gram of hydrocarbon combustion in excess of oxygen produces 1.2 L of CO2 and 0.4 L of H2O."
- **Analysis**: According to the law of conservation of mass, the mass of reactants must equal the mass of products. Here, we have:
- Mass of hydrocarbon = 1.6 g
- Mass of CO2 produced = 1.2 g (assuming the density of CO2 is 1 g/L)
- Mass of H2O produced = 0.4 g (assuming the density of H2O is 1 g/L)
- Total mass of products = 1.2 g + 0.4 g = 1.6 g
- **Conclusion**: This statement is true.

2. **Statement 2**: "The product of atomic mass and specific heat of any element is a constant and approximately 6.4."
- **Analysis**: This statement refers to Dulong-Petit law, which states that the product of the atomic mass of an element and its specific heat is approximately constant (around 6.4).
- **Conclusion**: This statement is true.

3. **Statement 3**: "The atomic masses of any element are fractional because they are a mixture of allotropes."
- **Analysis**: This statement is incorrect. Atomic masses are fractional because they are a mixture of isotopes, not allotropes. Allotropes are different forms of the same element in the same physical state.
- **Conclusion**: This statement is false.

4. **Statement 4**: "The best standard of atomic mass is hydrogen."
- **Analysis**: This statement is also incorrect. The standard for atomic mass is based on the carbon-12 isotope, specifically 1/12 of the mass of a carbon-12 atom, not hydrogen.
- **Conclusion**: This statement is false.

### Final Conclusion:
- The wrong statements are:
- Statement 3: "The atomic masses of any element are fractional because they are a mixture of allotropes." (False)
- Statement 4: "The best standard of atomic mass is hydrogen." (False)