A: Only if you want to skip the 30% reduced syllabus. The 2019 edition contains chapters on "Organic Chemistry" (Ethanol, Ethanoic acid) which were removed in 2021. Use 2021 solutions to avoid wasting time on deleted topics.
– Every numerical in Mole Concept or Stoichiometry doesn’t just end with an answer. It begins with “Since…” or “According to Avogadro’s law…” , forcing the student to retroactively justify. This is subtle genius: you cannot copy blindly. viraf j dalal chemistry class 10 textbook solutions 2021
For the Mole Concept , do not just look at the final answer. Study the unit cancellation. The 2021 solutions often show two methods (unitary method vs. molar method). Pick the one you understand best. A: Only if you want to skip the 30% reduced syllabus