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GENERAL ORGANIC CHEMISTRY

231461 Consider the acidity of the carboxylic acids
(i) $\mathrm{PhCOOH}$
(ii) $0-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
(iii) $\mathrm{p}-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
(iv) $\mathrm{m}-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
Which of the following orders is correct?

1 (i) $>$ (ii) $>$ (iii) $>$ (iv)
2 (ii) $>$ (iv) $>$ (iii) $>$ (i)
3 (ii) $>$ (iv) $>$ (i) $>$ (iii)
4 (ii) $>$ (iii) $>$ (iv) $>$ (i)
JCECE - 2008
GENERAL ORGANIC CHEMISTRY

231462 The correct order of increasing basic nature for the bases $\mathrm{NH}_{3}, \mathrm{CH}_{3} \mathrm{NH}_{2}$ and $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$ is

1 $\mathrm{CH}_{3} \mathrm{NH}_{2}<\mathrm{NH}_{3}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
2 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}<\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{NH}_{2}$
3 $\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
4 $\mathrm{CH}_{3} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}<\mathrm{NH}_{3}$
JCECE - 2008
GENERAL ORGANIC CHEMISTRY

231465 In aqueous solutions, the basic strength of amines decreases in the order

1 $\mathrm{CH}_{3} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$
2 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}>\mathrm{CH}_{3} \mathrm{NH}_{2}$
3 $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}>\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\mathrm{CH}_{3} \mathrm{NH}_{2}$
4 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\mathrm{CH}_{3} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$
JCECE - 2010
GENERAL ORGANIC CHEMISTRY

231467 Correct order of nucleophilicity is

1 $\mathrm{CH}_{3}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{OH}^{-}<\mathrm{F}^{-}$
2 $\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{CH}_{3}^{-}<\mathrm{NH}_{2}^{-}$
3 $\mathrm{OH}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{F}^{-}<\mathrm{CH}_{3}^{-}$
4 $\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{CH}_{3}^{-}$
JCECE - 2014
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GENERAL ORGANIC CHEMISTRY

231461 Consider the acidity of the carboxylic acids
(i) $\mathrm{PhCOOH}$
(ii) $0-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
(iii) $\mathrm{p}-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
(iv) $\mathrm{m}-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
Which of the following orders is correct?

1 (i) $>$ (ii) $>$ (iii) $>$ (iv)
2 (ii) $>$ (iv) $>$ (iii) $>$ (i)
3 (ii) $>$ (iv) $>$ (i) $>$ (iii)
4 (ii) $>$ (iii) $>$ (iv) $>$ (i)
JCECE - 2008
GENERAL ORGANIC CHEMISTRY

231462 The correct order of increasing basic nature for the bases $\mathrm{NH}_{3}, \mathrm{CH}_{3} \mathrm{NH}_{2}$ and $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$ is

1 $\mathrm{CH}_{3} \mathrm{NH}_{2}<\mathrm{NH}_{3}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
2 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}<\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{NH}_{2}$
3 $\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
4 $\mathrm{CH}_{3} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}<\mathrm{NH}_{3}$
JCECE - 2008
GENERAL ORGANIC CHEMISTRY

231465 In aqueous solutions, the basic strength of amines decreases in the order

1 $\mathrm{CH}_{3} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$
2 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}>\mathrm{CH}_{3} \mathrm{NH}_{2}$
3 $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}>\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\mathrm{CH}_{3} \mathrm{NH}_{2}$
4 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\mathrm{CH}_{3} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$
JCECE - 2010
GENERAL ORGANIC CHEMISTRY

231467 Correct order of nucleophilicity is

1 $\mathrm{CH}_{3}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{OH}^{-}<\mathrm{F}^{-}$
2 $\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{CH}_{3}^{-}<\mathrm{NH}_{2}^{-}$
3 $\mathrm{OH}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{F}^{-}<\mathrm{CH}_{3}^{-}$
4 $\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{CH}_{3}^{-}$
JCECE - 2014
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GENERAL ORGANIC CHEMISTRY

231461 Consider the acidity of the carboxylic acids
(i) $\mathrm{PhCOOH}$
(ii) $0-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
(iii) $\mathrm{p}-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
(iv) $\mathrm{m}-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
Which of the following orders is correct?

1 (i) $>$ (ii) $>$ (iii) $>$ (iv)
2 (ii) $>$ (iv) $>$ (iii) $>$ (i)
3 (ii) $>$ (iv) $>$ (i) $>$ (iii)
4 (ii) $>$ (iii) $>$ (iv) $>$ (i)
JCECE - 2008
GENERAL ORGANIC CHEMISTRY

231462 The correct order of increasing basic nature for the bases $\mathrm{NH}_{3}, \mathrm{CH}_{3} \mathrm{NH}_{2}$ and $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$ is

1 $\mathrm{CH}_{3} \mathrm{NH}_{2}<\mathrm{NH}_{3}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
2 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}<\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{NH}_{2}$
3 $\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
4 $\mathrm{CH}_{3} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}<\mathrm{NH}_{3}$
JCECE - 2008
GENERAL ORGANIC CHEMISTRY

231465 In aqueous solutions, the basic strength of amines decreases in the order

1 $\mathrm{CH}_{3} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$
2 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}>\mathrm{CH}_{3} \mathrm{NH}_{2}$
3 $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}>\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\mathrm{CH}_{3} \mathrm{NH}_{2}$
4 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\mathrm{CH}_{3} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$
JCECE - 2010
GENERAL ORGANIC CHEMISTRY

231467 Correct order of nucleophilicity is

1 $\mathrm{CH}_{3}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{OH}^{-}<\mathrm{F}^{-}$
2 $\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{CH}_{3}^{-}<\mathrm{NH}_{2}^{-}$
3 $\mathrm{OH}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{F}^{-}<\mathrm{CH}_{3}^{-}$
4 $\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{CH}_{3}^{-}$
JCECE - 2014
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GENERAL ORGANIC CHEMISTRY

231461 Consider the acidity of the carboxylic acids
(i) $\mathrm{PhCOOH}$
(ii) $0-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
(iii) $\mathrm{p}-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
(iv) $\mathrm{m}-\mathrm{NO}_{2} \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{COOH}$
Which of the following orders is correct?

1 (i) $>$ (ii) $>$ (iii) $>$ (iv)
2 (ii) $>$ (iv) $>$ (iii) $>$ (i)
3 (ii) $>$ (iv) $>$ (i) $>$ (iii)
4 (ii) $>$ (iii) $>$ (iv) $>$ (i)
JCECE - 2008
GENERAL ORGANIC CHEMISTRY

231462 The correct order of increasing basic nature for the bases $\mathrm{NH}_{3}, \mathrm{CH}_{3} \mathrm{NH}_{2}$ and $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$ is

1 $\mathrm{CH}_{3} \mathrm{NH}_{2}<\mathrm{NH}_{3}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
2 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}<\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{NH}_{2}$
3 $\mathrm{NH}_{3}<\mathrm{CH}_{3} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
4 $\mathrm{CH}_{3} \mathrm{NH}_{2}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}<\mathrm{NH}_{3}$
JCECE - 2008
GENERAL ORGANIC CHEMISTRY

231465 In aqueous solutions, the basic strength of amines decreases in the order

1 $\mathrm{CH}_{3} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$
2 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}>\mathrm{CH}_{3} \mathrm{NH}_{2}$
3 $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}>\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\mathrm{CH}_{3} \mathrm{NH}_{2}$
4 $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}>\mathrm{CH}_{3} \mathrm{NH}_{2}>\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$
JCECE - 2010
GENERAL ORGANIC CHEMISTRY

231467 Correct order of nucleophilicity is

1 $\mathrm{CH}_{3}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{OH}^{-}<\mathrm{F}^{-}$
2 $\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{CH}_{3}^{-}<\mathrm{NH}_{2}^{-}$
3 $\mathrm{OH}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{F}^{-}<\mathrm{CH}_{3}^{-}$
4 $\mathrm{F}^{-}<\mathrm{OH}^{-}<\mathrm{NH}_{2}^{-}<\mathrm{CH}_{3}^{-}$
JCECE - 2014