Question

Which of the following postulates of Dalton gives explanation of 'Law of definite proportions'?

• A. Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction
• B. Atoms of a given element are identical in mass and chemical properties
• C. Atoms of different elements have different masses and chemical properties
• D. The relative number and kinds of atoms are constant in a given compound

Answer 1

The correct option is D The relative number and kinds of atoms are constant in a given compound

Law of definite proportions states that “In a chemical substance the elements are always present in definite proportions by mass”.
'The relative number and kinds of atoms are constant in a given compound' this postulate explains the law.