Assertion :The laws of chemical combination ultimately led to the idea of 'atoms' being the "smallest unit of" matter. Reason: The laws of chemical combination played a significant role in the development of Dalton's atomic theory of matter.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
All matter consists of indivisible particles called atoms. This is the postulate of Dalton's theory.
The indivisibility of an atom was proved wrong an atom can be further subdivided into protons, neutrons, and electrons. However, an atom is the smallest particle that takes part in chemical reactions by the laws of chemical combination.
So, both assertion and reason are correct but the reason is not the correct explanation assertion.

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Similar questions

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum