1

IIT-JEE 2004 Screening

MCQ (Single Correct Answer)
According to molecular orbital theory which of the following statement about the magnetic character and bond order is correct regarding $$O_2^+$$
A
Paramagnetic and Bond order < O2
B
Paramagnetic and Bond order > O2
C
Diamagnetic and Bond order < O2
D
Diamagnetic and Bond order > O2
2

IIT-JEE 2003 Screening

MCQ (Single Correct Answer)
Which of the following are isoelectronic and isostructural?
$$NO_3^-$$, $$CO_3^{2-}$$, $$ClO_3^-$$, SO3
A
$$NO_3^-$$, $$CO_3^{2-}$$
B
SO3, $$NO_3^-$$
C
$$ClO_3^-$$, $$CO_3^{2-}$$
D
$$CO_3^{2-}$$, SO3
3

IIT-JEE 2002 Screening

MCQ (Single Correct Answer)
Which of the following molecular species has unpaired electrons(s)?
A
N2
B
F2
C
$$O_2^-$$
D
$$O_2^{2-}$$
4

IIT-JEE 2002 Screening

MCQ (Single Correct Answer)
Identify the least stable ion amongst the following
A
Li-
B
Be-
C
B-
D
C-

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