1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which of the following is not a correct statement?
A
Multiple bonds are always shorter than corresponding single bonds.
B
The electron-deficient molecules can act as Lewis acids.
C
The canonical structures have no real existence.
D
Every AB5 molecule does in fact have square pyramid structure.
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which of the following is not isostructural with SiCl4 ?
A
NH4$$-$$
B
SCl4
C
SO42$$-$$
D
PO43$$-$$
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which of the following species has a linear shape?
A
O3
B
NO2$$-$$
C
SO2
D
NO2+
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The electronegativity difference berween N and F is greater than that between N and H yet the dipole moment of NH3 (1.5D) is larger than that of NF3 (0.2 D). This is because
A
in NH3 the atomic dipole and bond dipole are in the opposite directions whereas in NF3 these are in the same direction
B
in NH3 as well as in NF3 the atomic dipole and bond dipole are in the same direction
C
in NH3 the atomic dipole and bond dipole are in the same direction whereas in NF3 these are in opposite directions
D
in NH3 as well as in NF3 the atomic dipole and bond dipole are in opposite directions.
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