Q.Assertion (A): One mole of $O_2$ and one mole of $O_3$ contain same number of molecules. \nReason (R): One mole of any substance contains Avogadro number of particles.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false

A is false but R is true

The correct solution involves applying the fundamental concept to derive the final value step by step...

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Q.Assertion (A): One mole of O2O_2O2​ and one mole of O3O_3O3​ contain same number of molecules. \nReason (R): One mole of any substance contains Avogadro number of particles.