1
IIT-JEE 2002 Screening
MCQ (Single Correct Answer)
+2
-0.5
Identify the least stable ion amongst the following
A
Li-
B
Be-
C
B-
D
C-
2
IIT-JEE 2002 Screening
MCQ (Single Correct Answer)
+1
-0.25
Which of the following molecular species has unpaired electrons(s)?
A
N2
B
F2
C
$$O_2^-$$
D
$$O_2^{2-}$$
3
IIT-JEE 2001 Screening
MCQ (Single Correct Answer)
+2
-0.5
The common features among the species CN-, CO and NO+ are
A
bond order three and isoelectronic
B
bond order three and weak field ligands
C
bond order two and $$\pi$$-acceptors
D
isoelectronic and weak field ligands
4
IIT-JEE 2000 Screening
MCQ (Single Correct Answer)
+2
-0.5
Molecular shape of SF4, CF4 and XeF4 are
A
the same, with 2, 0 and 1 lone pair of electrons
B
the same, with 1, 1 and 1 lone pair of electrons
C
different, with 0, 1 and 2 lone pairs of electrons respectively
D
different, with 1, 0 and 2 lone pairs of electrons respectively
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