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Per NCERT Class 11 Chemistry, what is the SI definition of the MOLE — adopted in 2019 redefinition?
AOne mole contains exactly 6.02214076 × 10²³ elementary entities — fixed value of Avogadro constant
BOne mole = 22.4 L at STP
COne mole = 1000 millimoles
DOne mole = mass of 12 g of carbon-12
Answer & Solution
Correct answer: A. One mole contains exactly 6.02214076 × 10²³ elementary entities — fixed value of Avogadro constant
Per NCERT §1.3.3 + §1.8, post-2019 SI: 1 mol = exactly 6.02214076 × 10²³ entities. The other options are older or contextual definitions.
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