1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
A
3d54s1
B
3d54s2
C
3d24s2
D
3d34s2
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Which of the following does not show optical isomerism?

(en = ethylenediamine)
A
[Co(NH3)3Cl3]0
B
[Co(en)Cl2(NH3)2]+
C
[Co(en)3]3+
D
[Co(en)2Cl2]+
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Out of TiF62$$-$$, CoF63$$-$$, Cu2Cl2 and NiCl42$$-$$ (Z of Ti = 22, Co = 27, Cu = 29, Ni = 28) the colourless species are
A
Cu2Cl2 and NiCl42$$-$$
B
TiF62$$-$$ and Cu2Cl2
C
CoF63$$-$$ and NiCl42$$-$$
D
TiF62$$-$$ and CoF63$$-$$
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
What is the [OH$$-$$] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2?
A
0.40 M
B
0.0050 M
C
0.12 M
D
0.10 M
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