1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
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pA and pB are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure of the solution will be
A
$${p_A} + {x_A}\left( {{p_B} - {p_A}} \right)$$
B
$${p_A} + {x_A}\left( {{p_A} - {p_B}} \right)$$
C
$${p_B} + {x_A}\left( {{p_B} - {p_A}} \right)$$
D
$${p_B} + {x_A}\left( {{p_A} - {p_B}} \right)$$
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
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 $$ \times $$ 10$$-$$3 bar. The molar mass of protein will be (R = 0.083 L bar mol$$-$$1 K$$-$$1)
A
51022 g mol$$-$$1
B
122044 g mol$$-$$1
C
31011 g mol$$-$$1
D
61038 g mol$$-$$1
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
A 0.1 molal aqueous solution of a weak acid is 30% ionized. If Kf for water is 1.86oC/m, the freezing point of the solution will be
A
$$-$$0.18oC
B
$$-$$0.54oC
C
$$-$$0.36oC
D
$$-$$0.24oC
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The van't Hoff factor $$i$$ for a compound which undergoes dissociation in one solvent and association in other solvent is respectively
A
less than one and greater than one
B
less than one and less than one
C
greater than one and less than one
D
greater than one and greater than one.
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