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GK QUESTION#3149

Which of the following statements are included in Dalton’s atomic theory? I. Matter consists of extremely small particles known as atoms that take part in chemical reactions. II. Atoms are indivisible and cannot be created or destroyed during a chemical reaction.

  1. AOnly I
  2. BOnly II
  3. CBoth I and IICorrect answer
  4. DNone of these
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Answer

C. Both I and II

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Explanation

Both are postulates of Dalton’s historical atomic theory: matter consists of atoms, and chemical reactions rearrange them without creating or destroying them. The claim that atoms are indivisible is historical; modern atomic theory recognises subatomic particles.

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