231335
Which of the following aromatic acids is most acidic?
1
2
3
4
Explanation:
Ortho substituted acid is stronger Benzoic acid is a resonance hybrid and so the carbonyl group is coplanar with the ring.
AMU - 2009
GENERAL ORGANIC CHEMISTRY
231336
Which of the following compounds is strongest acid?
1
2
3
4
Explanation:
The $-\mathrm{I}$ effect of $\mathrm{F}$ increases the acidic strength of carboxylic acid. Nearer the $\mathrm{F}$ atom to $\mathrm{COOH}$ group, stronger is the acid.
AMU-2006
GENERAL ORGANIC CHEMISTRY
231337
Which of the following compounds is most reactive in $S_{N} 1$ reaction?
1
2
3
4
Explanation:
The order of reactivity of alkyl halide is iodide $>$ bromide $>$ chloride and $3^{\circ}>2^{\circ}>1^{\circ}$ alkyl halide.
AMU-2006
GENERAL ORGANIC CHEMISTRY
231340
Which one of the following has maximum acid strength?
1 p-Nitrophenol
2 $\mathrm{p}$-Nitrobenzoic acid
3 m-Nitrobenzoic acid
4 o-Nitrobenzoic acid
Explanation:
The presence of $-\mathrm{NO}_{2}$ group at the ring disperse the $-\mathrm{ve}$ charge and thus, stabilizes the carboxylate anion. Due to this acid strength increases. Acid strength of aromatic acids depends on both inductive and resonance effects of substituents. In onitrobenzoic acid the strong inductive effect of nitro group close to carboxylate anion provides an additional strong delocalisation of the -ve charge so, onitrobenzoic acid is much stronger than its meta and para isomers.
231335
Which of the following aromatic acids is most acidic?
1
2
3
4
Explanation:
Ortho substituted acid is stronger Benzoic acid is a resonance hybrid and so the carbonyl group is coplanar with the ring.
AMU - 2009
GENERAL ORGANIC CHEMISTRY
231336
Which of the following compounds is strongest acid?
1
2
3
4
Explanation:
The $-\mathrm{I}$ effect of $\mathrm{F}$ increases the acidic strength of carboxylic acid. Nearer the $\mathrm{F}$ atom to $\mathrm{COOH}$ group, stronger is the acid.
AMU-2006
GENERAL ORGANIC CHEMISTRY
231337
Which of the following compounds is most reactive in $S_{N} 1$ reaction?
1
2
3
4
Explanation:
The order of reactivity of alkyl halide is iodide $>$ bromide $>$ chloride and $3^{\circ}>2^{\circ}>1^{\circ}$ alkyl halide.
AMU-2006
GENERAL ORGANIC CHEMISTRY
231340
Which one of the following has maximum acid strength?
1 p-Nitrophenol
2 $\mathrm{p}$-Nitrobenzoic acid
3 m-Nitrobenzoic acid
4 o-Nitrobenzoic acid
Explanation:
The presence of $-\mathrm{NO}_{2}$ group at the ring disperse the $-\mathrm{ve}$ charge and thus, stabilizes the carboxylate anion. Due to this acid strength increases. Acid strength of aromatic acids depends on both inductive and resonance effects of substituents. In onitrobenzoic acid the strong inductive effect of nitro group close to carboxylate anion provides an additional strong delocalisation of the -ve charge so, onitrobenzoic acid is much stronger than its meta and para isomers.
231335
Which of the following aromatic acids is most acidic?
1
2
3
4
Explanation:
Ortho substituted acid is stronger Benzoic acid is a resonance hybrid and so the carbonyl group is coplanar with the ring.
AMU - 2009
GENERAL ORGANIC CHEMISTRY
231336
Which of the following compounds is strongest acid?
1
2
3
4
Explanation:
The $-\mathrm{I}$ effect of $\mathrm{F}$ increases the acidic strength of carboxylic acid. Nearer the $\mathrm{F}$ atom to $\mathrm{COOH}$ group, stronger is the acid.
AMU-2006
GENERAL ORGANIC CHEMISTRY
231337
Which of the following compounds is most reactive in $S_{N} 1$ reaction?
1
2
3
4
Explanation:
The order of reactivity of alkyl halide is iodide $>$ bromide $>$ chloride and $3^{\circ}>2^{\circ}>1^{\circ}$ alkyl halide.
AMU-2006
GENERAL ORGANIC CHEMISTRY
231340
Which one of the following has maximum acid strength?
1 p-Nitrophenol
2 $\mathrm{p}$-Nitrobenzoic acid
3 m-Nitrobenzoic acid
4 o-Nitrobenzoic acid
Explanation:
The presence of $-\mathrm{NO}_{2}$ group at the ring disperse the $-\mathrm{ve}$ charge and thus, stabilizes the carboxylate anion. Due to this acid strength increases. Acid strength of aromatic acids depends on both inductive and resonance effects of substituents. In onitrobenzoic acid the strong inductive effect of nitro group close to carboxylate anion provides an additional strong delocalisation of the -ve charge so, onitrobenzoic acid is much stronger than its meta and para isomers.
231335
Which of the following aromatic acids is most acidic?
1
2
3
4
Explanation:
Ortho substituted acid is stronger Benzoic acid is a resonance hybrid and so the carbonyl group is coplanar with the ring.
AMU - 2009
GENERAL ORGANIC CHEMISTRY
231336
Which of the following compounds is strongest acid?
1
2
3
4
Explanation:
The $-\mathrm{I}$ effect of $\mathrm{F}$ increases the acidic strength of carboxylic acid. Nearer the $\mathrm{F}$ atom to $\mathrm{COOH}$ group, stronger is the acid.
AMU-2006
GENERAL ORGANIC CHEMISTRY
231337
Which of the following compounds is most reactive in $S_{N} 1$ reaction?
1
2
3
4
Explanation:
The order of reactivity of alkyl halide is iodide $>$ bromide $>$ chloride and $3^{\circ}>2^{\circ}>1^{\circ}$ alkyl halide.
AMU-2006
GENERAL ORGANIC CHEMISTRY
231340
Which one of the following has maximum acid strength?
1 p-Nitrophenol
2 $\mathrm{p}$-Nitrobenzoic acid
3 m-Nitrobenzoic acid
4 o-Nitrobenzoic acid
Explanation:
The presence of $-\mathrm{NO}_{2}$ group at the ring disperse the $-\mathrm{ve}$ charge and thus, stabilizes the carboxylate anion. Due to this acid strength increases. Acid strength of aromatic acids depends on both inductive and resonance effects of substituents. In onitrobenzoic acid the strong inductive effect of nitro group close to carboxylate anion provides an additional strong delocalisation of the -ve charge so, onitrobenzoic acid is much stronger than its meta and para isomers.
