1
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
During change of O2 to O$$_2^{ - }$$ ion, the electron adds on which one of the following orbitals ?
A
$${\pi ^ * }$$ orbital
B
$$\pi $$ orbital
C
$${\sigma ^ * }$$ orbital
D
$$\sigma $$ orbital
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Which one of the following pairs is isostructural (i.e., having the same shape and hybridization) ?
A
[BCl3 and BrCl3]
B
[NH3 and NO$$_3^ - $$]
C
[NF3 and BF3]
D
[BF$$_4^ - $$ and NH$$_4^ + $$]
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following species contains three bond pairs and one lone pair arround the central atom ?
A
H2O
B
BF3
C
NH2$$-$$
D
PCl3
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Bond order of 1.5 is shown by
A
O2+
B
O2$$-$$
C
O22$$-$$
D
O2
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