1
AIEEE 2010
+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
2
AIEEE 2010
+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 = $$\overline C$$ < $$\overline NH_2$$ < $$\overline R$$
3
AIEEE 2010
+4
-1
29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahl’s method and the evolved ammonia was absorbed in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. The percentage of nitrogen in the compound is
A
59.0
B
47.4
C
23.7
D
29.5
4
AIEEE 2009
+4
-1
Arrange the carbanions, $${(C{H_3})_3}\overline C$$, $$\overline C C{l_3}$$ , $${(C{H_3})_2}\overline C H$$, $${C_6}{H_5}\overline C H{}_2$$ in order of their decreasing stability :
A
$${(C{H_3})_2}\overline C H$$ > $$\overline C C{l_3}$$ > $${C_6}{H_5}\overline C H{}_2$$ > $${(C{H_3})_3}\overline C$$
B
$$\overline C C{l_3}$$ > $${C_6}{H_5}\overline C H{}_2$$ > $${(C{H_3})_2}\overline C H$$ > $${(C{H_3})_3}\overline C$$
C
$${(C{H_3})_3}\overline C$$ > $${(C{H_3})_2}\overline C H$$ > $${C_6}{H_5}\overline C H{}_2$$ > $$\overline C C{l_3}$$
D
$${C_6}{H_5}\overline C H{}_2$$ > $$\overline C C{l_3}$$ > $${(C{H_3})_3}\overline C$$ > $${(C{H_3})_2}\overline C H$$
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