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1
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
In BrF3 molecule, the lone pairs occupy equatorial positions to minimize
A
lone pair - bond pair repulsion only
B
bond pair - bond pair repulsion only
C
lone pair - lone pair repulsion and lone pair - bond pair repulsion
D
lone pair - lone pair repulsion only.
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Which one of the following statements is not correct for sigma- and pi- bonds formed between two carbon atoms?
A
sigma-bond is stronger than a pi-bond.
B
Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectively
C
Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bond.
D
Sigma-bond determines the direction between carbon atoms but a pi-bond has no primary effect in this regard.
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Which of the following is isoelectronic?
A
CO2, NO2
B
NO2$$-$$, CO2
C
CN$$-$$, CO
D
SO2, CO2
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
In NO3$$-$$ ion number of bond pair and lone pair of electrons on nitrogen atom are
A
2, 2
B
3, 1
C
1, 3
D
4, 0
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