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

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

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CBSE TEST PAPER-01
CLASS - XII CHEMISTRY (Solutions)
Topic: -Concentration of solutions
1. Define ‘solution’? 
2. Define the term ‘concentration? 
3. How does change in temperature changes the molarity and molality values? 
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? 
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
? 
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. 
7. Calculate the mole fraction of ethanol and water in a sample of rectified spirit
which contains 46%  ethanol by mass? 
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? 
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? 
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? 
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