The incorrect postulates of Dalton's atomic theory are:

(A) Atoms of different elements differ in mass.
(B) Matter consists of divisible atoms.
(C) Compounds form when atoms combine in a fixed ratio.

Question

The incorrect postulates of Dalton's atomic theory are:

(A) Atoms of different elements differ in mass.
(B) Matter consists of divisible atoms.
(C) Compounds form when atoms combine in a fixed ratio.
(D) All atoms of a given element have different properties including mass.
(E) Chemical reactions involve reorganisation of atoms.

Choose the correct answer:

Canvas Classes · Accepted Answer

Dalton's postulates: atoms are indivisible, identical within an element, combine in fixed ratios.

- (A) ✓ Correct — different elements have different masses.
- (B) ✗ Incorrect — Dalton said atoms are indivisible.
- (C) ✓ Correct — fixed ratios (law of definite proportions).
- (D) ✗ Incorrect — Dalton said atoms of same element are identical.
- (E) ✓ Correct — reactions reorganise atoms.

Incorrect: (B) and (D) → Answer: Option (2)

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