1
AIPMT 2011 Mains
+4
-1
What is the value of electron gain enthalpy of Na+ if IE1 of Na = 5.1 eV?
A
$$-$$ 5.1 eV
B
$$-$$ 10.2 eV
C
+2.55 eV
D
+10.2 eV
2
AIPMT 2011 Mains
+4
-1
Which of the following structures is the most preferred and hence of lowest energy for SO3?
A B C D 3
AIPMT 2011 Mains
+4
-1
A bubble of air is underwater at temperature 15oC and the pressure 1.5 bar. If the bubble rises to the surface where the temperature is 25oC and the pressure is 1.0 bar, what will happen to the volume of the bubble?
A
Volume will become greater by a factor of 1.6.
B
Volume will become greater by a factor of 1.1
C
Volume will become smaller by a factor of 0.70
D
Volume will become greater by a factor of 2.5
4
AIPMT 2011 Mains
+4
-1
Consider the following processes :

H (kJ/mol)
1/2A $$\to$$ B +150
3B  $$\to$$ 2C + D -125
E + A  $$\to$$ 2D +350

For B + D $$\to$$ E + 2C, $$\Delta$$H will be
A
525 kJ/mol
B
$$-$$175 kJ/mol
C
$$-$$ 325 kJ/mol
D
325 kJ/mol
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