Question

Amongst the following statements, that which was not proposed by Dalton was :

• A. matter consists of indivisible atoms.
• B. when gases combine or reproduced in a chemical reaction they do so in a simple ratio by volume provided all gases are at the same T & P.
• C. Chemical reactions involve reorganisation of atoms. These are neither created nor destroyed in a chemical reaction.
• D. all the atoms of a given element have identical properties including identical mass. Atoms of different elements differ in mass.

Answer 1

The correct option is B

when gases combine or reproduced in a chemical reaction they do so in a simple ratio by volume provided all gases are at the same T & P.

Explanation for correct option:

(B) when gases combine or reproduced in a chemical reaction they do so in a simple ratio by volume provided all gases are at the same T & P

This statement was not proposed by Dalton because it is part of Gay Lussac's law of combining gases.

Explanation for incorrect option:

(A) matter consists of indivisible atoms.

This statement belongs to Dalton's atomic theory.

(C) Chemical reactions involve the reorganisation of atoms. These are neither created nor destroyed in a chemical reaction.

This statement belongs to Dalton's atomic theory and is known as the law of conservation of mass.

(D) all the atoms of a given element have identical properties including identical mass. Atoms of different elements differ in mass.

This statement belongs to Dalton's atomic theory and is known as the law of definite proportion.

Hence, option B is correct, this statement does not belong to Dalton's atomic theory.