1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Consider an endothermic reaction, X $$\to$$ Y with the activation energies Eb and Ef for the backward and forward reactions, respectively. In general :
A
Eb < Ef
B
Eb > Ef
C
Eb = Ef
D
There is no definite relation between Eb and Ef
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
If $$\alpha$$ is the degree of dissociation of Na2SO4, the vant Hoff’s factor (i) used for calculating the molecular mass is :
A
1 + $$\alpha$$
B
1 + $$2\alpha$$
C
1 - $$\alpha$$
D
1 - $$2\alpha$$
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
The solubility product of a salt having general formula MX2, in water is: 4 $$\times$$ 10-12 . The concentration of M2+ ions in the aqueous solution of the salt is :
A
2.0 $$\times$$ 10-6 M
B
4.0 $$\times$$ 10-10 M
C
1.0 $$\times$$ 10-4 M
D
1.6 $$\times$$ 10-4 M
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
The exothermic formation of ClF3 is represented by the equation:
Cl2 (g) + 3F2 (g) $$\leftrightharpoons$$ 2ClF3 (g); $$\Delta H$$ = -329 kJ
Which of the following will increase the quantity of ClF3 in an equilibrium mixture of Cl2, F2 and ClF3?
A
Increasing the temperature
B
Removing Cl2
C
Increasing the volume of the container
D
Adding F2
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