AIPMT 2011 Solved Papers
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Chemistry 2011
Q. 1. The total number of atomic orbitals in fourth energy level of an atom is
(1) 4 (2) 8
(3) 16 (4) 32
Sol:
Number of atomic orbitals in an orbit
Answer : (3)
Q. 2. The electrode potentials for 
are +0.15 V and +0.50 V respectively. The value of 
.
(1) 0.150 V (2) 0.500 V
(3) 0.325 V (4) 0.650 V
sol.
Answer : (3)
Q. 3. Mole fraction of the solute in a 1.00 molal aqueous solution is
(1) 1.7700 (2) 0.1770
(3) 0.0177 (4) 0.0344
Sol.
Mole fraction of solute = 1/56.55 = 0.0177
Answer : (3)
Q. 4. By what factors does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?
(1) 1.4 (2) 2.0
(3) 2.8 (4) 4.0
Sol.
Answer : (1)
Q. 5. A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of 
is 0.20 M. If the equilibrium constant, Kb for NH3 equals 
, what is the pH of this solution?
(1) 8.73 (2) 9.08
(3) 9.43 (4) 11.72
Sol.
Answer : (3)