Chemistry : Part I for Class XII
Solutions - 03

Instructions 

1. All questions are compulsary.
2. Please give the explanation for the answer where applicable.
3. To view the answer, click on the Answer link alongside the Question.
You can view the answer when the link becomesGreen Red. on completion of allocated time.

Q.1) Which will have more osmotic pressure and why?  Solution prepared by dissolving 6g/L of CH3COOH or Solution prepared by dissolving 7.45g/L of KCl  (3 Marks) 

Q.2) On a hill station pure water boils at 99.82°C. The Kb of water is 0.513°C Kg mol–1. Calculate the boiling point of 0.69m solution of urea. (2 Marks) 

Q.3) A solution contains 25% water, 25% ethanol and 50% acetic acid by mass. Find mole fraction of each of the component.  (3 Marks) 

Q.4) Conc. H2SO4 has a density 1.9g/ml and is .99% H2SO4 by weight. Find molarity of solution. (3 Marks)