Dalton's atomic theory successfully explained:
i. Law of conservation of mass
ii. Law of constant composition
iii. Law of radioactivity
iv. Law of multiple proportion
- ((a))
i, ii, and iii
- ((b))
ii and iii
- ((c))
i, ii, and iv
- ((d))
ii, iii, and iv
Show Answer
i, ii, and iv
The Correct answer is Option 3.

Key Points
- Law of conservation of mass: Dalton's theory states that atoms are indivisible and cannot be created or destroyed in chemical reactions, supporting the conservation of mass.
- Law of constant composition: According to Dalton, a given compound always contains the same types of atoms in fixed ratios, explaining this law.
- Law of multiple proportions: Dalton's theory explains that when two elements form multiple compounds, the ratios of the masses of one element to the fixed mass of the other are small whole numbers.
- However, Dalton's atomic theory does not address radioactivity, as it was discovered later. Hence, option 3 is correct.









