AIPMT 2005 | Solutions Question 37 | Chemistry

AIPMT 2005

MCQ (Single Correct Answer)

-1

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

0.200

0.549

0.786

0.478

AIPMT 2005

MCQ (Single Correct Answer)

-1

A solution of urea (mol. mass 56 g mol^$$-$$1) boils at 100.18^oC at the atmospheric pressure. If K_f and K_b for water are 1.86 and 0.512 K kg mol^$$-$$1 respectively, the above solution will freeze at

0.654^oC

$$-$$ 0.654^oC

6.54^oC

$$-$$6.54^oC

AIPMT 2002

MCQ (Single Correct Answer)

-1

A solution containing components A and B folloes Raoult's law

A - B attraction force is greater than A - A and B - B

A - B attraction force is less than A - A and B - B

A - B attraction force remains same as A - A and B - B

volume of solution is different from sum of volume of solute and solvent.

AIPMT 2002

MCQ (Single Correct Answer)

-1

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?

$${M_2} = \left( {{{{m_2}} \over \pi }} \right)VRT$$

$${M_2} = \left( {{{{m_2}} \over V}} \right){{RT} \over \pi }$$

$${M_2} = \left( {{{{m_2}} \over V}} \right)\pi RT$$

$${M_2} = \left( {{{{m_2}} \over V}} \right){\pi \over {RT}}$$

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