70th BPSC Prelims Question Paper [Solved PDF]
1. 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) ii, iii and iv (B) i, ii and iii (C) i, ii and iv (D) i, iii and iv Answer: (C) i, ii and iv Explanation: Dalton’s atomic …