1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
In which of the following molecules/ions BF3, NO$$_2^ - $$, NH$$_2^ - $$ and H2O, the central atom is sp2 hybridised?
A
NH$$_2^ - $$ and H2O
B
NO$$_2^ - $$ and H2O
C
BF3 and NO$$_2^ - $$
D
NO$$_2^ - $$ and NH$$_2^ - $$
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
According to MO theory which of the lists ranks the nitrogen species in terms of increasing bond order ?
A
$$N_2^{2 - } < N_2^ - < {N_2}$$
B
$${N_2} < N_2^{2 - } < N_2^ - $$
C
$$N_2^ - < N_2^{2 - } < {N_2}$$
D
$$N_2^ - < {N_2} < N_2^{2 - }$$
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The energy absorbed by each molecule (A2) of a substance is 4.4 $$ \times $$ 10$$-$$19 J and bond energy per molecule is 4.0 $$ \times $$ 10$$-$$19 J. The kinetic energy of the molecule per atom will be
A
2.2 $$ \times $$ 10$$-$$19 J
B
2.0 $$ \times $$ 10$$-$$19 J
C
4.0 $$ \times $$ 10$$-$$20 J
D
2.0 $$ \times $$ 10$$-$$20 J
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The values of $$\Delta $$H and $$\Delta $$S for the reaction,

C(graphite) + CO2(g) $$ \to $$  2CO(g)

are 170 kJ and 170 J K$$-$$1, respectively. This reaction will be spontaneous at
A
910 K
B
1110 K
C
510 K
D
710 K
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