1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
If the enthalpy change for the transition of liquid water to steam is 30 kJ mol$$-$$1 at 27oC, the entropy change for the process would be
A
10 J mol$$-$$1 K$$-$$1
B
1.0 J mol$$-$$1 K$$-$$1
C
0.1 J mol$$-$$1 K$$-$$1
D
100 J mol$$-$$1 K$$-$$1
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The correct IUPAC name for the compound is

AIPMT 2011 Prelims Chemistry - Some Basic Concepts of Organic Chemistry Question 76 English
A
4-ethyl-3-propylhex-1-ene
B
3-ethyl-4-ethenylheptane
C
3-ethyl-4-propylhex-5-ene
D
3-(1 -ethylpropyl)hex- 1 -ene.
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following is least likely to behave as Lewis base?
A
H2O
B
NH3
C
BF3
D
OH$$-$$
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH+4 is 0.20 M. If the equilibrium constant, Kb for NH3 equals 1.8 $$ \times $$ 10$$-$$5, what is the pH of this solution? (log 2.7 = 0.43)
A
9.08
B
9.43
C
11.72
D
8.73