Assertion: The discovery of sub-atomic particles led to the failure of Dalton’s atomic theory. Reason: An atom is made up of protons, neutrons and electrons.
A
Assertion and reason are correct, but reason is not the correct explanation.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Both assertion and reason are correct, and reason is the correct explanation.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Assertion and reason, both are wrong.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Assertion is wrong, but the reason is correct.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is B Both assertion and reason are correct, and reason is the correct explanation. ∙ One of the postulates of Dalton's atomic theory states that 'atoms are indivisible and indestructible'.
∙ The discovery of sub-atomic particles led to the failure of Dalton’s atomic theory as an atom can be further subdivided into protons, neutrons and electrons.
∙ Hence, both assertion and reason are correct and reason is the correct explanation of assertion.