1
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
In aqueous solution the ionization constants for carbonic acid are
K1 = 4.2 x 10–7 and K2 = 4.8 x 10–11
Select the correct statement for a saturated 0.034 M solution of the carbonic acid.
A
The concentration of $$CO_3^{2−}$$ is 0.034 M.
B
The concentration of $$CO_3^{2−}$$ is greater than that of $$HCO_3^{−}$$
C
The concentration of H+ and $$HCO_3^−$$ are approximately equal.
D
The concentration of H+ is double that of $$CO_3^−$$.
2
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
At 25°C, the solubility product of Mg(OH)2 is 1.0 $$\times$$ 10–11. At which pH, will Mg2+ ions start precipitating in the form of Mg(OH)2 from a solution of 0.001 M Mg2+ ions?
A
9
B
10
C
11
D
8
3
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
Out of the following, the alkene that exhibits optical isomerism is
A
3–methyl–2–pentene
B
4–methyl–1–pentene
C
3–methyl–1–pentene
D
2–methyl–2–pentene
4
AIEEE 2010
MCQ (Single Correct Answer)
+4
-1
The correct order of increasing basicity of the given conjugate bases (R = CH3) is
A
$$RCO\overline O$$ < HC = $$\overline C$$ < $$\overline R$$ < $$\overline NH_2$$
B
$$\overline R$$ < HC = $$\overline C$$ < $$RCO\overline O$$ < $$\overline NH_2$$
C
$$RCO\overline O$$ < $$\overline NH_2$$ < HC = $$\overline C$$ < $$\overline R$$
D
$$RCO\overline O$$ < HC = $$\overline C$$ < $$\overline NH_2$$ < $$\overline R$$
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