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31 Years NEET Previous Year Questions: Solutions - 1 - Question 1

During osmosis, flow of water through a semi-permeable membrane [2006]

Detailed Solution for 31 Years NEET Previous Year Questions: Solutions - 1 - Question 1

31 Years NEET Previous Year Questions: Solutions - 1 - Question 2

A solution containing 10 g per dm^{ 3} of urea (molecular mass = 60 g mol^{–1}) is isotonic with a 5% solution of a non-volatile solute. The molecular mass of this nonvolatile solute is [2006]

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 3

1.00 g of a non-electrolyte solute (molar mass 250 g mol^{–1}) was dissolved in 51.2 g of benzene. If the freezing point depression constant, Kf of benzene is 5.12 K kg mol^{–1}, the freezing point of benzene will be lowered by [2006]

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 4

0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If K_{f} for water is 1.86 K kg mol^{– 1},the lowering in freezing point of the solution is

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 5

A 0. 00 20 m aqueous solution of an ionic compound Co(NH_{3})_{5}(NO_{2})Cl freezes at – 0.00732 °C. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (K_{f} = – 1.86°C/m)

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 6

An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase? [2010]

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 7

A solution of sucrose (molar mass = 342 g mol^{–1}) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be ( _{f }for water = 1.86 K kg mol^{–1}). [2010]

Detailed Solution for 31 Years NEET Previous Year Questions: Solutions - 1 - Question 7

31 Years NEET Previous Year Questions: Solutions - 1 - Question 8

2 5. 3 g of sodium carbonate, Na_{2} CO_{3} is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ions, Na^{+} and carbonate ions, CO_{3}^{2– }are respectively (Molar mass of Na_{2}CO_{3 }= 106 g mol^{–1}) [2010]

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 9

The freezing point depression constant for water is – 1.86ºC m^{–1}. If 5.00 g Na_{2}SO_{4} is dissolved in 45.0 g H_{2}O, the freezing point is changed by – 3.82ºC. Calculate the van’t Hoff factor for Na_{2}SO_{4}. [2011]

Detailed Solution for 31 Years NEET Previous Year Questions: Solutions - 1 - Question 9

31 Years NEET Previous Year Questions: Solutions - 1 - Question 10

The van’t Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively : [2011]

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 11

Mole fraction of the solute in a 1.00 molal aqueous solution is : [2011]

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 12

A 0.1 molal aqueous solution of a weak acid is 30% ionized. If K_{f} for water is 1.86°C/m, the freezing point of the solution will be : [2011 M]

Detailed Solution for 31 Years NEET Previous Year Questions: Solutions - 1 - Question 12

31 Years NEET Previous Year Questions: Solutions - 1 - Question 13

200 mL of an aqueous solution of a protein contains its 1.26 g. The osmotic pressure of this solution at 300 K is found to be 2.57 × 10^{–3 }bar.The molar mass of protein will be (R = 0.083 L bar mol^{–1 }K^{–1}) [2011 M]

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 14

P_{A} and P_{B} are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If X_{A} represents the mole fraction of component A, the total pressure of the solution will be. [2012]

Detailed Solution for 31 Years NEET Previous Year Questions: Solutions - 1 - Question 14

31 Years NEET Previous Year Questions: Solutions - 1 - Question 15

Vapour pressure of chloroform (CHCl_{3}) and dichloromethane (CH_{2}Cl_{2}) at 25ºC are 200 mm Hg and 415 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of CHCl_{3} and 40 g of CH_{2}Cl_{2} at the same temperature will be : (Molecular mass of CHCl_{3} = 119.5 u and molecular mass of CH_{2}Cl_{2} = 85 u). [2012 M]

Detailed Solution for 31 Years NEET Previous Year Questions: Solutions - 1 - Question 15

31 Years NEET Previous Year Questions: Solutions - 1 - Question 16

How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0M HNO_{3} ? The concentrated acid is 70% HNO_{3} [NEET 2013]

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31 Years NEET Previous Year Questions: Solutions - 1 - Question 17

Which condition is not satisfied by an ideal solution? [NEET Kar. 2013]

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