Concentration of solutions Test - Solutions Class 12 Notes | EduRev

Class 12 : Concentration of solutions Test - Solutions Class 12 Notes | EduRev

 Page 1


CBSE TEST PAPER-01 
CLASS - XII CHEMISTRY (Solutions) 
Topic: -Concentration of solutions 
1. Define ‘solution’? [1] 
2. Define the term ‘concentration? [1] 
3. How does change in temperature changes the molarity and molality values? [1] 
4. Calculate the volume of water which could be added to 20 ml of 0.65 m HCl to
dilute the solution to 0.2 m? [2] 
5. A solution is prepared by dissolving 11g glucose in 200 cm
3
 water at 30
0
 C.
What is the mass Percentage of glucose in solution? The density of water
30
0
C is 0.996 glcm
3
? [2] 
6. Find the molality and molarity of a 15%  solution of H 2SO 4 when its density
is 1.10 glcm
3
 & molar mass = 98 amu. [2] 
7. Calculate the mole fraction of ethanol and water in a sample of rectified spirit
which contains 46%  ethanol by mass? [2] 
8. Calculate the % composition in terms of mass of a solution obtained by mixing
300g of a 25% & 400 g of a 40% solution by mass? [2] 
9. One litre of sea water weight 1030g and contains about 6×10
-3
 g of dissolved 0 2.
Calculate the concentration of dissolved oxygen in ppm? [2] 
10. The density of 85% phosphoric acid is 1.70 g/cm
3
. What is the volume of a solution
that contains 17g of phosphoric acid? [2] 
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