AIPMT 2010 Solved Papers
Q. 1. Which one of the following species does not exist under normal conditions?
&;
Sol:
Bond order of 
= 0, cannot exit
Answer : (2)
Q. 2. Which of the following complex ion is not expected to absorb visible light?
sol.
: Number of unpaired electrons − 0
: Number of unpaired electrons − 3
: Number of unpaired electrons − 4
: Number of unpaired electrons − 2 Answer : (1)
Q. 3. If pH of a saturated solution of 
is 12, the value of its
is:
Sol.
Answer : (4)