1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Pure water can be obtained from sea water by
A
centrifugation
B
plasmolysis
C
reverse osmosis
D
sedimentation
2
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Standard electrode potentials are
Fe2+/Fe [Eo = $$-$$0.44] and
Fe3+/Fe2+[ Eo = 0.77];
If Fe2+, Fe3+ and Fe blocks are kept together, then
A
Fe3+ increases
B
Fe3+ decreases
C
Fe2+/Fe3+ remains unchanged
D
Fe2+ decreases.
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
When a bio-chemical reaction is carried out in laboratory, outside the human body in absence of enzyme, then rate of reaction obtained is 10$$-$$6 times, the activation energy of reaction in the presence of enzyme is
A
6/RT
B
P is required
C
different from E$$a$$ obtained in laboratory
D
can't say anything.
4
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
For the reaction;

2N2O5 $$ \to $$ 4NO2 + O2 rate and rate constant are 1.02 $$ \times $$ 10$$-$$4 and 3.4 $$ \times $$ 10$$-$$5 sec$$-$$1 respectively, then concentration of N2O5 at that time will be
A
1.732
B
3
C
1.02 $$ \times $$ 10$$-$$4
D
3.4 $$ \times $$ 105
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