Question

Question 4
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 proportions

(a) (i), (ii) and (iii)
(b) (i), (iii) and (iv)
(c) (ii), (iii) and (iv)
(d) (i), (ii) and (iv)

Answer 1

The answer is (d).
Dalton's atomic theory successfully explained the laws of chemical combination but nothing about radioactivity was mentioned by Dalton in his theory.