Q. Assertion (A) : Equal moles of different substances contain same number of constituent particles.
Reason (R) : Equal weights of different substances contain the same number of constituent particles.
The correct answer is

 2331  201 EAMCETEAMCET 2007Structure of Atom Report Error

Solution:

Equal moles of different substances contain same number of constituent particles but cqual weights of different substances do not contain the same number of constituent particles.