C2H5NH2 , C6H5NHCH3, (C2H5)2NH and C6H5NH2
For the above compounds, decreasing order of the pKb values (in gaseous phase) is -
1. C6H5NH2 > C6H5NHCH3 > C2H5NH2 > (C2H5)2NH
2. C2H5NH2 > C6H5NHCH3 > C6H5NH2 > (C2H5)2NH
3. C6H5NHCH3 > C6H5NH2 > C2H5NH2 > (C2H5)2NH
4. (C2H5)2NH > C6H5NHCH3 > C2H5NH2 > C6H5NH2
The increasing order of boiling point of :
C2H5OH, (CH3)2NH, C2H5NH2 is-
1. (CH3)2NH < C2H5NH2 < C2H5OH
2. (CH3)2NH > C2H5NH2 > C2H5OH
3. (CH3)2NH < C2H5NH2 > C2H5OH
4. (CH3)2NH < C2H5OH< C2H5NH2
The increasing sequence of solubility of the following molecules ;C6H5NH2, (C2H5)2NH, C2H5NH2
in water is -
1. C6H5NH2 < (C2H5)2NH < C2H5NH2
2. C6H5NH2 > (C2H5)2NH < C2H5NH2
3. C6H5NH2 > (C2H5)2NH > C2H5NH2
4. C6H5NH2 < (C2H5)2NH > C2H5NH2
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
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 |
:
The product from the above reaction would be -
X, Y, and Z in the above sequence are:
1. X= Fe/HCl, Y= , and Z = / warm
2. X= , Y= Fe/HCl, and Z = / warm
3. X= , Y= Fe/HCl, and Z =
4. X = Y = , and Z =
Benzyl chloride X 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
The formula of A and B in the following reaction is -
1.
2.
3.
4.
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