Question

Read the following passage and answer Q1 to Q3. Earlier the concept of equivalent weights was very common and the concentrations of the solutions were expressed in terms of normalities. The convenience was that the substances reacted in the ratio of their gram equivalents. So there was no need to write balanced equation to determine the amounts of the substances reacted. However, determination of equivalent weights posed difficulty in certain cases. Moreover,the equivalent weight of the same substance is not same in different reactions. For example, KMnO₄ has different equivalent weight in the basic medium than in the acidic medium.Hence, now a days, mole concept is more common and the concentrations of the solutions are generally expressed in terms of molarities,though some other methods like molality,mole fraction etc are also used. A 40% hydrochloric acid is found to have a density of 1.20 g ml⁻¹. The molarity of the solution is nearly? 12M 13M 14M 11M Q2: The mole fraction of hydrochloric acid in the solution will be? 0.25 0.30 0.35 0.40 Q3: The volume of the above solution requied to make 1.0L of 0.10 M HCl will be? 5.6 ml 6.6 ml 7.6 ml 8.6 ml

Answer 1

Answer:

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