Q.1 20ml of 10 N HCl are diluted with distilled water to form one litre of the solution. What is the normality of the diluted solution?
Q.2 A solution contains 25% of water, 25% of ethanol and 50% of acetic acid by mass. Calculate the mole fraction of ethanol component.
Q.3 Calculate the mol fraction of ethanol and water in a sample of rectified spirit which contains 95% of ethanol by mass.
Q.4 Calculate the molarity and normality of a solution containing 0.5 g of NaOH dissolved in 500 ml.
Q.5 Calculate the molality and mole fraction of the solute in aqueous solution containing 3.0 g of urea (molecular mass = 60) in 250 g of water.
Q.6 Which is not affected by temperature?
(a) Normality (b) Molarity and molality (c) Molarity (d) Molality
Q.7 The number of water molecules in one litre of water is
(a) 18 (b) 18 × 1000 (b) 18 × 1000 (c) NA (d) 55.55 NA (d) 55.55 NA
Q.8 0.115 g of pure sodium metal was dissolved in 500 ml distilled water. The molarity of the solution would be (Na = 23)
(a) 0.010 M (b) 0.00115 M (c) 0.023 M (d) 0.046 M
Q.9 Calculate molarity of 0.6 N AlCl3 solution.
Q.10 Calculate the molarity of a solution of NaOH in which 0.40g NaOH dissolved in 500 ml solution.