1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Benzene and toluene form nearly ideal solutions. At 20 oC, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20 oC for a solution containing 78 g of benzene and 46 g of toluene in torr is
A
50
B
25
C
53.5
D
37.5
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Equimolar solutions in the same solvent have
A
Same boiling point but different freezing point
B
Same freezing point but different boiling point
C
Same boiling and same freezing points
D
Different boiling and different freezing points
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
For a spontaneous reaction the ∆G , equilibrium constant (K) and $$E_{cell}^o$$ will be respectively
A
-ve, >1, +ve
B
+ve, >1, -ve
C
-ve, <1, -ve
D
-ve, >1, -ve
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Aluminium oxide may be electrolysed at 1000oC to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is Al3+ + 3e- $$\to$$ Alo To prepare 5.12 kg of aluminium metal by this method would require
A
5.49 $$\times$$ 107 C of electricity
B
1.83 $$\times$$ 107 C of electricity
C
5.49 $$\times$$ 104 C of electricity
D
5.49 $$\times$$ 101 C of electricity
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