1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Consider the following nuclear reactions
$${}_{92}^{238}M \to {}_Y^XN + 2{}_2^4He$$
$${}_Y^XN \to {}_B^AL + 2{\beta ^ + }$$
The number of neutrons in the element L is
A
140
B
144
C
142
D
146
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
For which of the following parameters the structural isomers C2H5OH and CH3OCH3 would be expected to have the same values? (Assume ideal behaviour)
A
Heat of vaporization
B
Gaseous densities at the same temperature and pressure
C
Boiling points
D
Vapour pressure at the same temperature
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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