Answer
Verified
398.7k+ views
Hint:To answer this type of question we should follow the leads given in the question. ‘A’ is an aromatic compound and the reaction with $B{{r}_{2}}$ and KOH is Hoffmann Bromamide degradation. This means that ‘A’ is an aromatic amine.
Complete step by step solution:Let’s see the answer of the give question:
First we will look at the facts given in the question,
‘A’ is an aromatic compound.
‘A’ on reaction with aqueous ammonia and on heating gives B. B on heating with $B{{r}_{2}}$ and KOH gives C. This is a Hoffmann Bromamide degradation reaction.
This means that B is an amide and C is an aromatic amine.
The only aromatic amine with the formula ${{C}_{6}}{{H}_{7}}N$is aniline.
So, B is benzamide and A is benzoic acid.
Hence, benzoic acid reacts with aqueous ammonia and on heating gives Benzamide.
Benzamide on heating with $B{{r}_{2}}$ and KOH gives aniline. This reaction is known as Hoffmann bromamide degradation.
${{C}_{6}}{{H}_{5}}COOH\,\xrightarrow[heat]{aqueous\,\,ammonia}\,{{C}_{6}}{{H}_{5}}CON{{H}_{2}}\,\xrightarrow[KOH]{bromine gas}\,{{C}_{6}}{{H}_{5}}N{{H}_{2}}$
A= Benzoic acid (${{C}_{6}}{{H}_{5}}COOH$)
B= Benzamide (${{C}_{6}}{{H}_{5}}CON{{H}_{2}}$)
C= Aninile (${{C}_{6}}{{H}_{5}}N{{H}_{2}}$)
Note: When an amide is reacted with bromine in an aqueous solution containing a strong base to give a primary amine is known as Hoffmann Bromamide Degradation. One of the characteristics of this reaction is that it leads to the reduction in the number of carbon atoms present originally in the compound.
Complete step by step solution:Let’s see the answer of the give question:
First we will look at the facts given in the question,
‘A’ is an aromatic compound.
‘A’ on reaction with aqueous ammonia and on heating gives B. B on heating with $B{{r}_{2}}$ and KOH gives C. This is a Hoffmann Bromamide degradation reaction.
This means that B is an amide and C is an aromatic amine.
The only aromatic amine with the formula ${{C}_{6}}{{H}_{7}}N$is aniline.
So, B is benzamide and A is benzoic acid.
Hence, benzoic acid reacts with aqueous ammonia and on heating gives Benzamide.
Benzamide on heating with $B{{r}_{2}}$ and KOH gives aniline. This reaction is known as Hoffmann bromamide degradation.
${{C}_{6}}{{H}_{5}}COOH\,\xrightarrow[heat]{aqueous\,\,ammonia}\,{{C}_{6}}{{H}_{5}}CON{{H}_{2}}\,\xrightarrow[KOH]{bromine gas}\,{{C}_{6}}{{H}_{5}}N{{H}_{2}}$
A= Benzoic acid (${{C}_{6}}{{H}_{5}}COOH$)
B= Benzamide (${{C}_{6}}{{H}_{5}}CON{{H}_{2}}$)
C= Aninile (${{C}_{6}}{{H}_{5}}N{{H}_{2}}$)
Note: When an amide is reacted with bromine in an aqueous solution containing a strong base to give a primary amine is known as Hoffmann Bromamide Degradation. One of the characteristics of this reaction is that it leads to the reduction in the number of carbon atoms present originally in the compound.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Select the word that is correctly spelled a Twelveth class 10 english CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
What organs are located on the left side of your body class 11 biology CBSE
What is BLO What is the full form of BLO class 8 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE