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1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Which of the following hydrogen bonds is the strongest?
A
O−H…….N
B
F−H…….F
C
O−H…….O
D
O−H…….F
2
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizinig order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+?
A
Mg2+ < Be2+ < K+ < Ca2+
B
K+ < Ca2+ < Mg2+ < Be2+
C
Be2+ < K+ < Ca2+ < Mg2+
D
Ca2+ < Mg2+ < Be2+ < K+
3
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Which of the following species exhibits the diamagnetic behaviour?
A
$$O_2^{2−}$$
B
NO
C
$$O_2^+$$
D
O2
4
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
Which of the following molecules/ions does not contain unpaired electrons?
A
$$O_2^{2−} $$
B
B2
C
$$N_2^+$$
D
O2

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