IIT FOUNDATION
Test – 1 (X std)
Name-___________________________________________________ Marks: 25m
I. ANSWER THE FOLLOWING :
1) A solution is 25% water, 25% ethanol and 50% acetic acid by mass. Calculate the mole fractions of each component.
2) A commercially available sample of sulphuric acid is 15% H2SO4 by weight. Calculate (i) molarity (ii) normality (iii) molality of the solution
3) A sugar syrup of weight 214.2g contains 34.2g of sugar. Calculate
(i) molal concentration, acid
(ii) mole fraction of sugar in the syrup.
4) One litre solution of N/2 HCI is heated in a beaker. It was observed that when the volume of the solution is reduced to 600ml, 3.25g of HCI is lost. Calculate the normality of the new solution.
5) What is the mole fraction of the solute in 2.5m aqueous solution?
6) Calculate the volume of 80% H2SO4 by weight required to prepare 1L of 0.2 MH2SO4.
7) The mole fraction of benzene in a solutions with toluene is 0.50. calculate the weight percent of benzene in the solution.
8) Calculate the formality of sodium thiosulphate solution, 1.24g which are dissolved in 100cm3 of the solution.
9) 100ml of a solution containing 5g of NaOH are mixed with 200ml of NaOH. Calculate the molarity of the resulting solution.

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