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 Multiple Choice QuestionsShort Answer Type

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1. Calculate the mass percentage of benzene (C6H6) and carbon tetrachloride (CCl4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.
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 Multiple Choice QuestionsLong Answer Type

2.

Calculate the mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride.

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3. Calculate the molarity of each of the following solution (a) 30 g of Co(NO3)2.6H2O in 4.3 L solution (b) 30 mL of 0.5 MH2SO4 diluted to 500 mL.
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4. Calculate the mass of urea (NH2CONH2) required in making 2.5 kg 0.25 of molal aqueous solution.
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5.

Calculate (a) molality (b) molarity and (c) mole fraction of KI if the density of 20% (mass/mass) aqueous KI is 1.202 g mL-1.

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 Multiple Choice QuestionsShort Answer Type

6. H2S, a toxic gas with rotten egg like smell, is used for the qualitative analysis. If the solubility of H2S in water at S.T.P. is 0.195 m, calculate Henry's law constant.
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7. Henry’s law constant for CO2 in water is 1.67 x 108 Pa at 298 K. Calculate the quantity of CO2 in 500 mL of soda water when packed under 2.5 atm CO2 pressure at 298 K.
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8. The vapour pressure of pure liquids A and B are 450 and 700 mm Hg at 350 K respectively. Find out the composition of the liquid mixture if total vapour pressure is 600 mm Hg. Also find the composition of the vapour phase.
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 Multiple Choice QuestionsLong Answer Type

9. Vapour pressure of pure water at 298 K is 23.8 mm. 50 g of urea (NH2CONH2) is dissolved in 850 g of water. Calculate the vapour pressure of water for this solution and its relative lowering.
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10. Boiling point of water at 750 mm Hg 99.630C. How much sucrose is to be added to 500g of water such that it boils at 1000C.
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