Civil Services TNPSC Group 1 (New Syllabus) Mock Test 2025 General Science Chemistry Basic Concepts of Chemistry
Consider the following postulates of the atomic theory by John Dalton. Identify the correct ones.
a) Atoms of various elements exhibit different natures. They do not have similar features.
b) By combining in a ratio of the whole number, atoms form the compounds.
c) Atoms are never destroyed nor created during any chemical reaction.
1
Only a & b
2
Only b & c
3
Only a & c
4
All a, b, c
5
Answer not known