question_answer 62)

  Arun has prepared 0.01% (by mass) solution of sodium chloride in water. Which of the following correctly represents the composition of the solutions? (a) 1.00 g of NaCl + 100 g of water                             (b) 0.11 g of NaCl + 100 g of water (c) 0.01 g of NaCl + 99.99 g of water                         (d) 0.10 g of NaCl + 99.90 g of water

Answer:

  (c) Here Mass%                  Which is equal to the percentage of sodium chloride in water prepared by Arun. So, option (c.) is correct. In option a), mass % In option b, mass % In option(d), mass % These % are not equal to the % of sodium chloride solution in water prepared by Arun. So, these are incorrect.