NextMockதேர்வுகளைத் தேடுங்கள், எ.கா. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2024

BPSC – Combined Competitive Examination · வினா 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 proportions

  1. ii, iii and iv
  2. i, ii and iii
  3. i, ii and iv
  4. i, iii and iv
விடையைக் காட்டு & விளக்கம்

விடை: (C) i, ii and iv

விளக்கம்

Dalton's indivisible-atom theory explained the laws of chemical combination, not radioactivity (which shows atoms can break down).

  • (A) தவறு

    Wrong: radioactivity was discovered later and contradicts indivisible atoms.

  • (B) தவறு

    Wrong: Dalton's theory could not explain radioactivity.

  • (C) சரி

    Correct: the theory explained conservation of mass, constant composition and multiple proportions.

  • (D) தவறு

    Wrong: radioactivity is not explained by it.