Which of the following statement is true?
(a) According to Dalton, atoms are divisible.
(b) Atoms do not take part in a chemical reaction
(c) The atoms of an element are different from those of other elements
(d) Atoms can be broken into molecules.

AcademicChemistryNCERTClass 6

Correct Answer: (c) The atoms of an element are different from those of other elements

Explanation: 

According to Dalton\'s Atomic Theory,

  1. All matter is made up of very small particles called \'atoms\'.
  2. Atoms cannot be divided.
  3. Atoms can neither be created nor be destroyed.
  4. Atoms are of various kinds. There are as many kinds of atoms as are elements.
  5. All the atoms of a given element are identical in every respect, having the same mass, size, and chemical properties.
  6. Atoms of different elements differ in mass, size, and chemical properties.
  7. The \'number\' and \'kind\' of atoms in a given compound are fixed.
  8. During chemical combination, atoms of different elements combine in small whole numbers to form compounds.
  9. Atoms of the same elements can combine in more than one ratio to form more than one compound.

Now according to the question, option (a) is incorrect (postulate 2).

Option (b) is incorrect as stated by postulates 8 and 9.

Option (d) is incorrect as molecules can be broken into atoms.

Option (c) is correct as confirmed by postulate 6: Atoms of different elements differ in mass, size, and chemical properties.

raja
Updated on 10-Oct-2022 13:40:49

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