Atomos Test Generator Free PYQs ExamsMy practice Log in / Sign up free

Solutions

AIPMT 2006MCQMedium📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2006

A solution containing 10 g per dm3 of urea (molecular mass = 60 g mol-1) is isotonic with a 5% solution of a nonvolatile solute. The molecular mass of this nonvolatile solute is

  1. 200 g mol-1
  2. 250 g mol-1
  3. 300 g mol-1
  4. 350 g mol-1

Answer

(3) 300 g mol-1

Solution

∵ Isotonic solutions have the same osmotic pressure, = CRT ⇒ C1 = C2

Urea: C1 = 1060 1 mol L-1 = 16 mol L-1

5% (w/v) solution: 5 g in 100 mL = 50 g in 1 L ⇒ C2 = 50M mol L-1

⇒ 50M = 16

∴ M = 300 g mol-1

Answer: (3)

Keep practising — Solutions

Ques. 2AIPMT 2005

The mole fraction of the solute in one molal aqueous solution is

  1. 0.009
  2. 0.018
  3. 0.027
  4. 0.036
Ques. 3AIPMT 2005

The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be

  1. 72 torr
  2. 140 torr
  3. 68 torr
  4. 20 torr
Ques. 4AIPMT 2005

A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressures of the pure hydrocarbons at 20 are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in the vapour phase would be

  1. 0.200
  2. 0.549
  3. 0.786
  4. 0.478
Ques. 5AIPMT 2005

A solution of urea (mol. mass 60 g mol-1) boils at 100.18 at the atmospheric pressure. If Kf and Kb for water are 1.86 and 0.512 K kg mol-1 respectively, the above solution will freeze at

  1. 0.654
  2. -0.654
  3. 6.54
  4. -6.54
Ques. 6AIPMT 2003

Formation of solution from two components can be considered as (i) Pure solvent separated solvent molecules, H1 (ii) Pure solute separated solute molecules, H2 (iii) Separated solvent and solute molecules solution, H3 Solution so formed will be ideal if

  1. Hsoln = H1 + H2 + H3
  2. Hsoln = H1 + H2 - H3
  3. Hsoln = H1 - H2 - H3
  4. Hsoln = H3 - H1 - H2
Ques. 7AIPMT 2002

A solution containing components A and B follows Raoult's law when

  1. A-B attraction force is greater than A-A and B-B
  2. A-B attraction force is less than A-A and B-B
  3. A-B attraction force remains same as A-A and B-B
  4. volume of solution is different from sum of volumes of solute and solvent
Ques. 8AIPMT 2002

A solution contains non-volatile solute of molecular mass M2. Which of the following can be used to calculate the molecular mass of solute in terms of osmotic pressure?

  1. M2 = ( m2 )VRT
  2. M2 = ( m2V ) RT
  3. M2 = ( m2V ) RT
  4. M2 = ( m2V ) RT
Ques. 9AIPMT 2001

Pure water can be obtained from sea water by

  1. centrifugation
  2. plasmolysis
  3. reverse osmosis
  4. sedimentation
Ques. 10AIPMT 2000

From the colligative properties of solution, which one is the best method for the determination of molecular weight of proteins and polymers?

  1. Osmotic pressure
  2. Lowering in vapour pressure
  3. Lowering in freezing point
  4. Elevation in boiling point

All Solutions PYQs →

PDFDownload Solutions PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolid StateSolutionsElectrochemistryChemical KineticsSurface Chemistry
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular StructureHydrogens-Block Elementsp-Block Elements (Group 13 & 14)Environmental ChemistryGeneral Principles of Isolation of Elementsp-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPolymersChemistry in Everyday LifePrinciples Related to Practical Chemistry