Numerical Problems On Molality -Multiple Choice Questions Quiz

Interactive MCQs on “Numerical Problems On Molality”:

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Question 1: A solution is prepared by dissolving 25 grams of sugar (molar mass = 342 g/mol) in 200 grams of water. Calculate the molality of the solution.

(a) 0.183 mol/kg
(b) 0.279 mol/kg
(c) 0.418 mol/kg
(d) 0.732 mol/kg

Question 2: A solution contains 30 grams of sodium chloride (molar mass = 58.44 g/mol) dissolved in 500 grams of water. Calculate the molality of the solution.

(a) 0.52 mol/kg
(b) 1.03 mol/kg
(c) 1.44 mol/kg
(d) 2.05 mol/kg

Question 3: Calculate the molality of a solution containing 40 grams of ethanol (molar mass = 46.07 g/mol) dissolved in 250 grams of water.

(a) 0.548 mol/kg
(b) 0.745 mol/kg
(c) 1.23 mol/kg
(d) 1.89 mol/kg

Question 4: A solution is prepared by dissolving 15 grams of urea (molar mass = 60.06 g/mol) in 300 grams of water. Calculate the molality of the solution.

(a) 0.25 mol/kg
(b) 0.50 mol/kg
(c) 0.75 mol/kg
(d) 1.00 mol/kg

Question 5: Calculate the molality of a solution containing 60 grams of sucrose (molar mass = 342.3 g/mol) dissolved in 400 grams of water.

(a) 0.50 mol/kg
(b) 0.60 mol/kg
(c) 0.75 mol/kg
(d) 0.90 mol/kg

Question 6: A solution is prepared by dissolving 25 grams of potassium nitrate (molar mass = 101.1 g/mol) in 150 grams of water. Calculate the molality of the solution.

(a) 0.24 mol/kg
(b) 0.32 mol/kg
(c) 0.48 mol/kg
(d) 0.65 mol/kg

Question 7: Calculate the molality of a solution containing 80 grams of ammonium chloride (molar mass = 53.49 g/mol) dissolved in 500 grams of water.

(a) 0.67 mol/kg
(b) 1.10 mol/kg
(c) 1.45 mol/kg
(d) 1.80 mol/kg

Question 8: A solution is prepared by dissolving 30 grams of glucose (molar mass = 180.16 g/mol) in 250 grams of water. Calculate the molality of the solution.

(a) 0.25 mol/kg
(b) 0.50 mol/kg
(c) 0.75 mol/kg
(d) 1.00 mol/kg

Question 9: Calculate the molality of a solution containing 50 grams of calcium chloride (molar mass = 110.98 g/mol) dissolved in 300 grams of water.

(a) 0.45 mol/kg
(b) 0.65 mol/kg
(c) 0.85 mol/kg
(d) 1.05 mol/kg

Question 10: A solution is prepared by dissolving 40 grams of potassium sulfate (molar mass = 174.26 g/mol) in 400 grams of water. Calculate the molality of the solution.

(a) 0.23 mol/kg
(b) 0.36 mol/kg
(c) 0.50 mol/kg
(d) 0.64 mol/kg