1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH+4 is 0.20 M. If the equilibrium constant, Kb for NH3 equals 1.8 $$ \times $$ 10$$-$$5, what is the pH of this solution? (log 2.7 = 0.43)
A
9.08
B
9.43
C
11.72
D
8.73
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following is least likely to behave as Lewis base?
A
H2O
B
NH3
C
BF3
D
OH$$-$$
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
For the reaction, N2(g) + O2(g) $$\rightleftharpoons$$ 2NO(g), the equilibrium constant is K1. The equilibrium constant is K2 for the reaction,
2NO(g) + O2(g) $$\rightleftharpoons$$ 2NO2(g)
What is K for the reaction,
NO2(g) $$\rightleftharpoons$$ $${1 \over 2}$$N2(g) + O2(g)
A
$${1 \over {2{K_1}{K_2}}}$$
B
$${1 \over {4{K_1}{K_2}}}$$
C
$${\left[ {{1 \over {{K_1}{K_2}}}} \right]^{1/2}}$$
D
$${1 \over {{K_1}{K_2}}}$$
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear ?
A
CH3 $$-$$ CH $$=$$ CH $$-$$ CH3
B
CH3 $$-$$ C$$ \equiv $$C $$-$$ CH3
C
CH2 $$=$$ CH $$-$$ CH2 $$-$$ C$$ \equiv $$CH
D
CH3 $$-$$ CH2 $$-$$ CH2 $$-$$ CH3
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