1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Among the following which is not the $$\pi $$-bonded organometallic compound?
A
K [PtCl3 ($$\eta $$2 $$-$$ C2H4)]
B
Fe ($$\eta $$5 $$-$$ C5H5)2
C
Cr ($$\eta $$6 $$-$$ C6H6)2
D
(CH3)4Sn
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The number of unpaired electrons in the complex ion [CoF6]3$$-$$ is
(Atomic no. : Co = 27)
A
2
B
3
C
4
D
zero
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ is
(Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71)
A
Y3+ < La3+ < Eu3+ < Lu3+
B
Y3+ < Lu3+ < Eu3+ < La3+
C
Lu3+ < Eu3+ < La3+ < Y3+
D
La3+ < Eu3+ < Lu3+ < Y3+
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
In this reaction :
CH3CHO + HCN $$ \to $$ CH3CH(OH)CN
           $$\buildrel {HOH} \over \longrightarrow $$ CH3CH(OH)COOH
an asymmetric centre is generated. The acid obtained would be
A
$$D$$-isomer
B
$$L$$-isomer
C
50% $$D$$ + 50% $$L$$-isomer
D
20% $$D$$ + 80% $$L$$-isomer
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