1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
An element, X has the following isotopic composition:
200X : 90%  199X : 8.0%  202X : 2.0%

The weighted average atomic mass of the naturally occuring element X is closest to
A
201 amu
B
202 amu
C
199 amu
D
200 amu
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
The mole fraction of the solute in one molal aqueous solution is
A
0.009
B
0.018
C
0.027
D
0.036
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
The maximum number of molecules is present in
A
15 L of H2 gas at STP
B
5 L of N2 gas at STP
C
0.5 g of H2 gas
D
10 g of O2 gas
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Which has maximum molecules?
A
7 g N2
B
2 g H2
C
16 g NO2
D
16 g O2
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