Which of the following statements are wrong?

• A

  1.6 g of a hydrocarbon on combustion in excess of oxygen produces 1.2 of CO₂ and 0.4 of H₂O. The data illustrates the law of conservation of mass.

• B

  The product of atomic mass and specific heat of any elements is a constant and is approximately 6.4. This is known as Dulong Petit's law.

• C

  The atomic masses of the elements are usually fractional because they are mixtures of allotropes.

• D

  The best standard of atomic mass is hydrogen -1.008.