C2H5NH2 , C6H5NHCH3, (C2H5)2NH and C6H5NH2 

For the above compounds, decreasing order of the pKb values (in gaseous phase) is -

1. C6H5NHC6H5NHCHC2H5NH2(C2H5)2NH

2. C2H5NH2 C6H5NHCHC6H5NH2 > (C2H5)2NH

3. C6H5NHCH3 C6H5NH2 C2H5NH2(C2H5)2NH

4. (C2H5)2NH C6H5NHCHC2H5NH2C6H5NH2

Subtopic:  Amines - Preparation & Properties |
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The increasing order of boiling point of :

 C2H5OH, (CH3)2NH, C2H5NH2 is-

1. (CH3)2NH < C2H5NH< C2H5OH

2. (CH3)2NH > C2H5NH2 > C2H5OH

3. (CH3)2NH < C2H5NH> C2H5OH

4. (CH3)2NH <  C2H5OH< C2H5NH

Subtopic:  Amines - Preparation & Properties |
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The increasing sequence of solubility of the following molecules ;C6H5NH2, (C2H5)2NH, C2H5NH 

in water is -

1. C6H5NH2 < (C2H5)2NH < C2H5NH2

2. C6H5NH2 > (C2H5)2NH < C2H5NH2

3. C6H5NH2 > (C2H5)2NH > C2H5NH2

4. C6H5NH2 < (C2H5)2NH > C2H5NH2

Subtopic:  Amines - Preparation & Properties |
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Amines are less acidic than alcohols of comparable molecular masses because :

1. N is more electronegative than O.

2. O is more electronegative than N.

3. N can accomodate negative charge easily than O

4. Amides are more stable than alcohols

Subtopic:  Amines - Preparation & Properties |
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Aromatic primary amines cannot be prepared by Gabriel phthalimide synthesis because :

1. Alkyl halides do not undergo electrophilic substitution with the anion formed by the phthalimide
2. Alkyl halides do not undergo nucleophilic substitution with the anion formed by the phthalimide
3. Aryl halides do not undergo nucleophilic substitution with the anion formed by the phthalimide
4. Aryl halides do not undergo electrophilic substitution with the anion formed by the phthalimide

Subtopic:  Amines - Preparation & Properties |
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C6H5N2Cl+H3PO2+H2O:

The product from the above reaction would be -

1.C6H5NC

2. C6H6CH3

3.C6H5CN

4. C6H6

 

Subtopic:  Amines - Preparation & Properties |
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X, Y, and Z in the above sequence are:

1. X= Fe/HCl, Y= Br2/FeCl3, and Z = H2O/ warm

2. X= Br2/FeCl3, Y= Fe/HCl, and Z = H2O/ warm

3.  X= HBr/ hv, Y= Fe/HCl, and Z = H3PO2

4. X = HBr/ hv Y = Br2/FeCl3, and Z = H3PO2

Subtopic:  Amines - Preparation & Properties |
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Benzyl chloride KCN X LiAlH4 Y

The product X and Y are -

1. 2-Phenylethanenitrile and Benzoic acid

2. Benzonitrile and Benzoic acid

3. 2-Phenylethanenitrile and 2-Phenylethanamine

4. Benzonitrile and 2-Phenylethanamine

Subtopic:  Amines - Preparation & Properties |
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The formula of A and B in the following reaction is -

C6H5N2Cl  CuCN C6H5CN  H2O /H+  A NH3 ,B
1. C6H5COOH, and C6H5CONH2
2. C6H5COOH, and C6H5NH2
3. C6H5CH2NH2, and C6H5CH2N=NH
4. C6H5CH2NH2, and  C6H5CH2N=NH

Subtopic:  Amines - Preparation & Properties |
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Consider the following statements related to ammonolysis.

a. Cleavage of C-X bond by ammonia takes place.
b. Ammonolysis produces primary, secondary, tertiary amine and quaternary ammonium salt.
c. In ammonolysis, ammonia is a nucleophile.


The true statement(s) are-
1. a, b
2. a, b, c
3. a, c
4. b

Subtopic:  Amines - Preparation & Properties |
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