Question

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. $\left(\mathrm{i}\right),\left(\mathrm{ii}\right)\mathrm{and}\left(\mathrm{iii}\right)$
• B. $\left(\mathrm{i}\right),\left(\mathrm{iii}\right)\mathrm{and}\left(\mathrm{iv}\right)$
• C. $\left(\mathrm{ii}\right),\left(\mathrm{iii}\right)\mathrm{and}\left(\mathrm{iv}\right)$
• D. $\left(\mathrm{i}\right),\left(\mathrm{ii}\right)\mathrm{and}\left(\mathrm{iv}\right)$

Answer 1

The correct option is D

$\left(\mathrm{i}\right),\left(\mathrm{ii}\right)\mathrm{and}\left(\mathrm{iv}\right)$

Explanation for the correct option:

Option(D): $\left(\mathrm{i}\right),\left(\mathrm{ii}\right)\mathrm{and}\left(\mathrm{iv}\right)$

• Dalton's atomic theory is the theory that states that all matter was composed of atoms, indivisible and indestructible building blocks, Whereas all atoms of an element, were known to be identical, different elements had atoms of different sizes and masses.
• Dalton’s theory was able to explain the Law of conservation of mass, the Law of constant composition, Law of multiple proportions.
• Also, the theory is being able to provide the basis to differentiate between elements and compounds.

Explanation for the incorrect option:

Option(A):$\left(\mathrm{i}\right),\left(\mathrm{ii}\right)\mathrm{and}\left(\mathrm{iii}\right)$

• Dalton’s theory can explain the Law of conservation of mass, the Law of constant composition, Law of multiple proportions. But it never gives any details of the Law of radioactivity.
• As among the given option, not all options can relate to the theory of Dalton's atomic model, hence the given option is an incorrect one.

Option(B):$\left(\mathrm{i}\right),\left(\mathrm{iii}\right)\mathrm{and}\left(\mathrm{iv}\right)$

• Dalton’s theory is helpful to explain the Law of conservation of mass, the Law of constant composition, Law of multiple proportions. But it never gives any details of the Law of radioactivity.
• As among the given option, not all options can relate to the theory of Dalton's atomic model, hence the given option does not completely correspond to the correct concept.

Option(D):$\left(\mathrm{ii}\right),\left(\mathrm{iii}\right)\mathrm{and}\left(\mathrm{iv}\right)$

• Dalton’s theory explains the Law of conservation of mass, the Law of constant composition, Law of multiple proportions. But it never gives any details of the Law of radioactivity.
• As among the given option, not all options can relate to the theory of Dalton's atomic model, hence the given option does not completely coincide with to the correct concept.

Hence, Dalton’s atomic theory successfully explained the Law of conservation of mass, the Law of constant composition, and the Law of multiple proportions i.e Option(D): $\left(\mathrm{i}\right),\left(\mathrm{ii}\right)\mathrm{and}\left(\mathrm{iv}\right)$.