323398
Select the correct statement(s) for the following.
1 Nitriles are hydrolyzed to amides and then to acids in the presence of \({\mathrm{\mathrm{H}^{+}}}\)or \({\mathrm{\mathrm{OH}^{-}}}\)as catalyst.
2 Mild reaction conditions are used to stop the reaction at the amide stage during the hydrolysis of nitriles
3 Grignard reagents react with dry ice to form salts of carboxylic acids which in turn give corresponding carboxylic acids after acidification with mineral acid
4 All of the above
Explanation:
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323399
In which of the following compounds the methylenic hydrogens are the most acidic?
Acid hydrolysis of an ester gives two different organic compounds. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COO}}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to \) \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}}}\limits_{{\text{ Both organic compounds }}} {\text{ + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\) Acid hydrolysis of a symmetrical anhydride gives two molecules of the same organic compound. \(\left(\mathrm{CH}_{2} \mathrm{CO}\right)_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{CH}_{3} \mathrm{COOH}\) While the acid hydrolysis of an amide gives one organic and one inorganic product as, \({\text{C}}{{\text{H}}_3}{\text{CON}}{{\text{H}}_2} + {{\text{H}}_2}{\text{O}} \to \) \(\mathop {{\text{C}}{{\text{H}}_3}{\text{COOH}}}\limits_{{\text{ Organic compound }}} \,\, + \mathop {{\text{N}}{{\text{H}}_3}}\limits_{{\text{ Inorganic compound }}} \)
AIIMS - 2008
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323401
Order of hydrolysis for the following I. \(\mathrm{RCOCl}\) II. RCOOR III. \(\mathrm{RCONH}_{2}\) IV. \({{\rm{(RCO)}}_{\rm{2}}}{\rm{O}}\)
1 I \(>\) IV \(>\) II \(>\) III
2 I \(>\) II \(>\) III \(>\) IV
3 I \(>\) III \(>\) II \(>\) IV
4 IV \(>\) III \(>\) II \(>\) I
Explanation:
Acid chlorides are most reactive and are easily hydrolysed by water as follows Acid anhydrides are less reactive than acid chlorides. They are hydrolysed slowly by water than acid chloride. Esters are hydrolysed by water only in presence of acid or alkali. Amides are hydrolysed by water in the presence of an acid Hence, the correct order of hydrolysis is \({\rm{RCOCl > (RCO}}{{\rm{)}}_{\rm{2}}}{\rm{O > RCOOR > RCON}}{{\rm{H}}_{\rm{2}}}\)
NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323398
Select the correct statement(s) for the following.
1 Nitriles are hydrolyzed to amides and then to acids in the presence of \({\mathrm{\mathrm{H}^{+}}}\)or \({\mathrm{\mathrm{OH}^{-}}}\)as catalyst.
2 Mild reaction conditions are used to stop the reaction at the amide stage during the hydrolysis of nitriles
3 Grignard reagents react with dry ice to form salts of carboxylic acids which in turn give corresponding carboxylic acids after acidification with mineral acid
4 All of the above
Explanation:
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323399
In which of the following compounds the methylenic hydrogens are the most acidic?
Acid hydrolysis of an ester gives two different organic compounds. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COO}}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to \) \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}}}\limits_{{\text{ Both organic compounds }}} {\text{ + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\) Acid hydrolysis of a symmetrical anhydride gives two molecules of the same organic compound. \(\left(\mathrm{CH}_{2} \mathrm{CO}\right)_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{CH}_{3} \mathrm{COOH}\) While the acid hydrolysis of an amide gives one organic and one inorganic product as, \({\text{C}}{{\text{H}}_3}{\text{CON}}{{\text{H}}_2} + {{\text{H}}_2}{\text{O}} \to \) \(\mathop {{\text{C}}{{\text{H}}_3}{\text{COOH}}}\limits_{{\text{ Organic compound }}} \,\, + \mathop {{\text{N}}{{\text{H}}_3}}\limits_{{\text{ Inorganic compound }}} \)
AIIMS - 2008
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323401
Order of hydrolysis for the following I. \(\mathrm{RCOCl}\) II. RCOOR III. \(\mathrm{RCONH}_{2}\) IV. \({{\rm{(RCO)}}_{\rm{2}}}{\rm{O}}\)
1 I \(>\) IV \(>\) II \(>\) III
2 I \(>\) II \(>\) III \(>\) IV
3 I \(>\) III \(>\) II \(>\) IV
4 IV \(>\) III \(>\) II \(>\) I
Explanation:
Acid chlorides are most reactive and are easily hydrolysed by water as follows Acid anhydrides are less reactive than acid chlorides. They are hydrolysed slowly by water than acid chloride. Esters are hydrolysed by water only in presence of acid or alkali. Amides are hydrolysed by water in the presence of an acid Hence, the correct order of hydrolysis is \({\rm{RCOCl > (RCO}}{{\rm{)}}_{\rm{2}}}{\rm{O > RCOOR > RCON}}{{\rm{H}}_{\rm{2}}}\)
323398
Select the correct statement(s) for the following.
1 Nitriles are hydrolyzed to amides and then to acids in the presence of \({\mathrm{\mathrm{H}^{+}}}\)or \({\mathrm{\mathrm{OH}^{-}}}\)as catalyst.
2 Mild reaction conditions are used to stop the reaction at the amide stage during the hydrolysis of nitriles
3 Grignard reagents react with dry ice to form salts of carboxylic acids which in turn give corresponding carboxylic acids after acidification with mineral acid
4 All of the above
Explanation:
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323399
In which of the following compounds the methylenic hydrogens are the most acidic?
Acid hydrolysis of an ester gives two different organic compounds. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COO}}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to \) \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}}}\limits_{{\text{ Both organic compounds }}} {\text{ + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\) Acid hydrolysis of a symmetrical anhydride gives two molecules of the same organic compound. \(\left(\mathrm{CH}_{2} \mathrm{CO}\right)_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{CH}_{3} \mathrm{COOH}\) While the acid hydrolysis of an amide gives one organic and one inorganic product as, \({\text{C}}{{\text{H}}_3}{\text{CON}}{{\text{H}}_2} + {{\text{H}}_2}{\text{O}} \to \) \(\mathop {{\text{C}}{{\text{H}}_3}{\text{COOH}}}\limits_{{\text{ Organic compound }}} \,\, + \mathop {{\text{N}}{{\text{H}}_3}}\limits_{{\text{ Inorganic compound }}} \)
AIIMS - 2008
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323401
Order of hydrolysis for the following I. \(\mathrm{RCOCl}\) II. RCOOR III. \(\mathrm{RCONH}_{2}\) IV. \({{\rm{(RCO)}}_{\rm{2}}}{\rm{O}}\)
1 I \(>\) IV \(>\) II \(>\) III
2 I \(>\) II \(>\) III \(>\) IV
3 I \(>\) III \(>\) II \(>\) IV
4 IV \(>\) III \(>\) II \(>\) I
Explanation:
Acid chlorides are most reactive and are easily hydrolysed by water as follows Acid anhydrides are less reactive than acid chlorides. They are hydrolysed slowly by water than acid chloride. Esters are hydrolysed by water only in presence of acid or alkali. Amides are hydrolysed by water in the presence of an acid Hence, the correct order of hydrolysis is \({\rm{RCOCl > (RCO}}{{\rm{)}}_{\rm{2}}}{\rm{O > RCOOR > RCON}}{{\rm{H}}_{\rm{2}}}\)
323398
Select the correct statement(s) for the following.
1 Nitriles are hydrolyzed to amides and then to acids in the presence of \({\mathrm{\mathrm{H}^{+}}}\)or \({\mathrm{\mathrm{OH}^{-}}}\)as catalyst.
2 Mild reaction conditions are used to stop the reaction at the amide stage during the hydrolysis of nitriles
3 Grignard reagents react with dry ice to form salts of carboxylic acids which in turn give corresponding carboxylic acids after acidification with mineral acid
4 All of the above
Explanation:
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323399
In which of the following compounds the methylenic hydrogens are the most acidic?
Acid hydrolysis of an ester gives two different organic compounds. \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COO}}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to \) \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}}}\limits_{{\text{ Both organic compounds }}} {\text{ + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\) Acid hydrolysis of a symmetrical anhydride gives two molecules of the same organic compound. \(\left(\mathrm{CH}_{2} \mathrm{CO}\right)_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{CH}_{3} \mathrm{COOH}\) While the acid hydrolysis of an amide gives one organic and one inorganic product as, \({\text{C}}{{\text{H}}_3}{\text{CON}}{{\text{H}}_2} + {{\text{H}}_2}{\text{O}} \to \) \(\mathop {{\text{C}}{{\text{H}}_3}{\text{COOH}}}\limits_{{\text{ Organic compound }}} \,\, + \mathop {{\text{N}}{{\text{H}}_3}}\limits_{{\text{ Inorganic compound }}} \)
AIIMS - 2008
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323401
Order of hydrolysis for the following I. \(\mathrm{RCOCl}\) II. RCOOR III. \(\mathrm{RCONH}_{2}\) IV. \({{\rm{(RCO)}}_{\rm{2}}}{\rm{O}}\)
1 I \(>\) IV \(>\) II \(>\) III
2 I \(>\) II \(>\) III \(>\) IV
3 I \(>\) III \(>\) II \(>\) IV
4 IV \(>\) III \(>\) II \(>\) I
Explanation:
Acid chlorides are most reactive and are easily hydrolysed by water as follows Acid anhydrides are less reactive than acid chlorides. They are hydrolysed slowly by water than acid chloride. Esters are hydrolysed by water only in presence of acid or alkali. Amides are hydrolysed by water in the presence of an acid Hence, the correct order of hydrolysis is \({\rm{RCOCl > (RCO}}{{\rm{)}}_{\rm{2}}}{\rm{O > RCOOR > RCON}}{{\rm{H}}_{\rm{2}}}\)
