1
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
The degree of dissociation ($$\alpha$$ ) of a weak electrolyte, AxBy is related to van’t Hoff factor (i) by the expression :
A
$$\alpha = {{i - 1} \over {x + y + 1}}$$
B
$$\alpha = {{x + y - 1} \over {i - 1}}$$
C
$$\alpha = {{x + y + 1} \over {i - 1}}$$
D
$$\alpha = {{i - 1} \over {(x + y - 1)}}$$
2
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
A 5.2 molal aqueous solution of methyl alcohol, CH3OH, is supplied. What is the mole fraction of methyl alcohol in the solution ?
A
0.190
B
0.086
C
0.050
D
0.100
3
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at −6oC will be : [Kf for water = 1.86 K kg mol−1 , and molar mass of ethylene glycol = 62 g mol−1 )
A
204.30 g
B
400.00 g
C
304.60 g
D
804.32 g
4
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
The reduction potential of hydrogen half cell will be negative if :
A
p(H2) = 1 atm and [H+] = 1.0 M
B
p(H2) = 1 atm and [H+] = 2.0 M
C
p(H2) = 2 atm and [H+] =1.0 M
D
p(H2) = 2 atm and [H+] =2.0 M
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