1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
In a first order reaction, the concentration of the reactant decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is
A
30 minutes
B
60 minutes
C
7.5 minutes
D
15 minutes
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Identify the correct statements regarding enzymes
A
Enzymes are specific biological catalysts that can normally function at very high temperature (T ~ 1000 K)
B
Enzymes are specific biological catalysts that the posses well – defined active sites
C
Enzymes are specific biological catalysts that can not be poisoned
D
Enzymes are normally heterogeneous catalysts that are very specific in their action
3
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Which one of the following aqueous solutions will exhibit highest boiling point?
A
0.01 M Na2SO4
B
0.015 M glucose
C
0.015 M urea
D
0.01 M KNO3
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Which of the following liquid pairs shows a positive deviation from Raoult’s law?
A
Water – hydrochloric acid
B
Acetone – chloroform
C
Water – nitric acid
D
Benzene – methanol

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