Question

“All matter is made up of very small particles which cannot be further broken down. These particles are called atoms”. This statement is one of the assumption of:
A. Rutherford’s nuclear theory
B. Bohr’s theory
C. Dalton’s atomic theory
D. Kinetic theory of gases

Answer 1

Hint: In order to the question, first we have to know the all given optional theories. And according to John Dalton, atoms can neither be created nor be destroyed. Atoms are indestructible.Besides this,we should have knowledge of all these theories.


Complete solution:
 “All matter is made up of very small particles which cannot be further broken down. These particles are called atoms”. This statement is one of the assumptions (or we can call postulates) of Dalton’s atomic theory.
According to John Dalton’s theory, everything is made up of atoms, which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. The atoms of different elements vary in size and mass. Compounds are produced through different whole-number combinations of atoms. According to him, atoms can neither be created nor be destroyed. It cannot be further divided or broken down.
The few main assumptions or postulates of Dalton’s atomic theory:-
1. All matter is made up of very small particles which cannot be further broken down. These small particles are called atoms.
2. All the particles of a given component are indistinguishable in size, mass, compound properties and so on..
3. Atoms of different elements have different sizes, masses and chemical properties.
4. The atoms don't go through regions during substance responses and can't be made or destroyed by any compound cycle, i.e., particles are indestructible.

Hence,the correct option is C.

Note: Drawbacks of Dalton’s atomic theory:-
1. It does not account for subatomic particles.
2. It does not account for isotopes.
3. It does not account for isobars and so on..