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
$$N_2^ - < {N_2} < N_2^{2 - }$$
2
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
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
From the following bond energies :
H $$-$$ H bond energy : 431.37 kJ mol$$-$$1 C $$=$$ C bond energy : 606.10 kJ mol$$-$$1 C $$-$$ C bond energy : 336.49 kJ mol$$-$$1 C $$-$$ H bond energy : 410.50 kJ mol$$-$$1 Enthalpy for the reaction,
will be
A
$$-$$ 243.6 kJ mol$$-$$1
B
$$-$$ 120.0 kJ mol$$-$$1
C
553.0 kJ mol$$-$$1
D
1523.6 kJ mol$$-$$1
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The dissociation constants for acetic acid and HCN at 25oC are 1.5 $$ \times $$ 10$$-$$5 and 4.5 $$ \times $$ 10$$-$$10 respectively. The equilibrium constant for the equilibrium
CN$$-$$ + CH3COOH $$\rightleftharpoons$$ HCN + CH3COO$$-$$ would be
