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  1. If Avogadro number NA, is charged from 6.022 ˣ 10²³ mol⁻¹ to 6.022 ˣ 10²⁰ mol⁻¹
  2. In the periodic table going down in fluorine group
  3. 0.765 gm of acid gives 0.55 g of CO₂ and 0.12 g of H₂O.Then find the ratio
  4. A solution containing 6 g urea per litre is isotonic with a solution containing
  5. Which of the following contains amino group