323717
Assertion : The \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid is lower than that of phenol Reason : Phenoxide ion is more resonance stabilised.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Acetic acid \((\mathrm{pKa}=4.76)\) is more acidic than phenol \((\mathrm{pKa}=10)\). This is due to the greater resonance stabilization in the acetate ion compared to the phenoxide ion. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323718
Assertion : Peracids are stronger acids than corresponding carboxylic acids. Reason : The anion of carboxylic acids is stabilised by resonance but not that of peracids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Correct assertion: Peracids are weaker acids than corresponding carboxylic acids.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323719
The correct order for the acidic character of the following carboxylic acids is:
1 IV \(>\) I \(>\) II \(>\) III \(>\) V
2 V \(>\) II \(>\) IV \(>\) I \(>\) III
3 V \(>\) II \(>\) III \(>\) I \(>\) IV
4 None of these
Explanation:
In option \({\text{(V)}}\) the conjugate base is stabilized by intramoleculaar \(\mathrm{H}\)-bonding from 2 ends. Options II & IV have ortho effect. Option III is least due to \(+\mathrm{M}\) effect of \(-\mathrm{OH}\) group.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323720
The strongest acid amongst the following compounds is
\({\rm{ - I}}\) effect exerting (electron withdrawing) groups increases the acidic strength of an acid by withdrawing electron density toward itself, thereby weakening \(\mathrm{O}-\mathrm{H}\) bond; thus, the release of \(\mathrm{H}^{+}\)ion by an acid becomes easier. However, +I effect exerting ( \(e^{-}\)releasing) groups decreases the acidic strength by donating electron density to O-atom. Further, -I effect decreases with distance. Thus, the acidic strength of the given acids would be
Hence, is the most acidic and the strongest acid than other given compounds.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323721
The correct decreasing order for acid strength is
Order of electron withdrawing effect exerting group is \(-\mathrm{NO}_{2}>-\mathrm{CN}>\mathrm{F}>-\mathrm{Cl}\). Hence, the acid strength order is \(\mathrm{NO}_{2} \mathrm{NCH}_{2} \mathrm{COOH}>\mathrm{NCCH}_{2} \mathrm{COOH}>\) \(\mathrm{FCH}_{2} \mathrm{COOH}>\mathrm{ClCH}_{2} \mathrm{COOH}\). acidic strength \({\rm{\alpha }}\frac{{\rm{1}}}{{{\rm{ - 'I'}}\,\,{\rm{effect}}}}\)
323717
Assertion : The \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid is lower than that of phenol Reason : Phenoxide ion is more resonance stabilised.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Acetic acid \((\mathrm{pKa}=4.76)\) is more acidic than phenol \((\mathrm{pKa}=10)\). This is due to the greater resonance stabilization in the acetate ion compared to the phenoxide ion. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323718
Assertion : Peracids are stronger acids than corresponding carboxylic acids. Reason : The anion of carboxylic acids is stabilised by resonance but not that of peracids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Correct assertion: Peracids are weaker acids than corresponding carboxylic acids.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323719
The correct order for the acidic character of the following carboxylic acids is:
1 IV \(>\) I \(>\) II \(>\) III \(>\) V
2 V \(>\) II \(>\) IV \(>\) I \(>\) III
3 V \(>\) II \(>\) III \(>\) I \(>\) IV
4 None of these
Explanation:
In option \({\text{(V)}}\) the conjugate base is stabilized by intramoleculaar \(\mathrm{H}\)-bonding from 2 ends. Options II & IV have ortho effect. Option III is least due to \(+\mathrm{M}\) effect of \(-\mathrm{OH}\) group.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323720
The strongest acid amongst the following compounds is
\({\rm{ - I}}\) effect exerting (electron withdrawing) groups increases the acidic strength of an acid by withdrawing electron density toward itself, thereby weakening \(\mathrm{O}-\mathrm{H}\) bond; thus, the release of \(\mathrm{H}^{+}\)ion by an acid becomes easier. However, +I effect exerting ( \(e^{-}\)releasing) groups decreases the acidic strength by donating electron density to O-atom. Further, -I effect decreases with distance. Thus, the acidic strength of the given acids would be
Hence, is the most acidic and the strongest acid than other given compounds.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323721
The correct decreasing order for acid strength is
Order of electron withdrawing effect exerting group is \(-\mathrm{NO}_{2}>-\mathrm{CN}>\mathrm{F}>-\mathrm{Cl}\). Hence, the acid strength order is \(\mathrm{NO}_{2} \mathrm{NCH}_{2} \mathrm{COOH}>\mathrm{NCCH}_{2} \mathrm{COOH}>\) \(\mathrm{FCH}_{2} \mathrm{COOH}>\mathrm{ClCH}_{2} \mathrm{COOH}\). acidic strength \({\rm{\alpha }}\frac{{\rm{1}}}{{{\rm{ - 'I'}}\,\,{\rm{effect}}}}\)
323717
Assertion : The \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid is lower than that of phenol Reason : Phenoxide ion is more resonance stabilised.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Acetic acid \((\mathrm{pKa}=4.76)\) is more acidic than phenol \((\mathrm{pKa}=10)\). This is due to the greater resonance stabilization in the acetate ion compared to the phenoxide ion. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323718
Assertion : Peracids are stronger acids than corresponding carboxylic acids. Reason : The anion of carboxylic acids is stabilised by resonance but not that of peracids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Correct assertion: Peracids are weaker acids than corresponding carboxylic acids.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323719
The correct order for the acidic character of the following carboxylic acids is:
1 IV \(>\) I \(>\) II \(>\) III \(>\) V
2 V \(>\) II \(>\) IV \(>\) I \(>\) III
3 V \(>\) II \(>\) III \(>\) I \(>\) IV
4 None of these
Explanation:
In option \({\text{(V)}}\) the conjugate base is stabilized by intramoleculaar \(\mathrm{H}\)-bonding from 2 ends. Options II & IV have ortho effect. Option III is least due to \(+\mathrm{M}\) effect of \(-\mathrm{OH}\) group.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323720
The strongest acid amongst the following compounds is
\({\rm{ - I}}\) effect exerting (electron withdrawing) groups increases the acidic strength of an acid by withdrawing electron density toward itself, thereby weakening \(\mathrm{O}-\mathrm{H}\) bond; thus, the release of \(\mathrm{H}^{+}\)ion by an acid becomes easier. However, +I effect exerting ( \(e^{-}\)releasing) groups decreases the acidic strength by donating electron density to O-atom. Further, -I effect decreases with distance. Thus, the acidic strength of the given acids would be
Hence, is the most acidic and the strongest acid than other given compounds.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323721
The correct decreasing order for acid strength is
Order of electron withdrawing effect exerting group is \(-\mathrm{NO}_{2}>-\mathrm{CN}>\mathrm{F}>-\mathrm{Cl}\). Hence, the acid strength order is \(\mathrm{NO}_{2} \mathrm{NCH}_{2} \mathrm{COOH}>\mathrm{NCCH}_{2} \mathrm{COOH}>\) \(\mathrm{FCH}_{2} \mathrm{COOH}>\mathrm{ClCH}_{2} \mathrm{COOH}\). acidic strength \({\rm{\alpha }}\frac{{\rm{1}}}{{{\rm{ - 'I'}}\,\,{\rm{effect}}}}\)
323717
Assertion : The \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid is lower than that of phenol Reason : Phenoxide ion is more resonance stabilised.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Acetic acid \((\mathrm{pKa}=4.76)\) is more acidic than phenol \((\mathrm{pKa}=10)\). This is due to the greater resonance stabilization in the acetate ion compared to the phenoxide ion. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323718
Assertion : Peracids are stronger acids than corresponding carboxylic acids. Reason : The anion of carboxylic acids is stabilised by resonance but not that of peracids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Correct assertion: Peracids are weaker acids than corresponding carboxylic acids.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323719
The correct order for the acidic character of the following carboxylic acids is:
1 IV \(>\) I \(>\) II \(>\) III \(>\) V
2 V \(>\) II \(>\) IV \(>\) I \(>\) III
3 V \(>\) II \(>\) III \(>\) I \(>\) IV
4 None of these
Explanation:
In option \({\text{(V)}}\) the conjugate base is stabilized by intramoleculaar \(\mathrm{H}\)-bonding from 2 ends. Options II & IV have ortho effect. Option III is least due to \(+\mathrm{M}\) effect of \(-\mathrm{OH}\) group.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323720
The strongest acid amongst the following compounds is
\({\rm{ - I}}\) effect exerting (electron withdrawing) groups increases the acidic strength of an acid by withdrawing electron density toward itself, thereby weakening \(\mathrm{O}-\mathrm{H}\) bond; thus, the release of \(\mathrm{H}^{+}\)ion by an acid becomes easier. However, +I effect exerting ( \(e^{-}\)releasing) groups decreases the acidic strength by donating electron density to O-atom. Further, -I effect decreases with distance. Thus, the acidic strength of the given acids would be
Hence, is the most acidic and the strongest acid than other given compounds.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323721
The correct decreasing order for acid strength is
Order of electron withdrawing effect exerting group is \(-\mathrm{NO}_{2}>-\mathrm{CN}>\mathrm{F}>-\mathrm{Cl}\). Hence, the acid strength order is \(\mathrm{NO}_{2} \mathrm{NCH}_{2} \mathrm{COOH}>\mathrm{NCCH}_{2} \mathrm{COOH}>\) \(\mathrm{FCH}_{2} \mathrm{COOH}>\mathrm{ClCH}_{2} \mathrm{COOH}\). acidic strength \({\rm{\alpha }}\frac{{\rm{1}}}{{{\rm{ - 'I'}}\,\,{\rm{effect}}}}\)
323717
Assertion : The \(\mathrm{pK}_{\mathrm{a}}\) of acetic acid is lower than that of phenol Reason : Phenoxide ion is more resonance stabilised.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Acetic acid \((\mathrm{pKa}=4.76)\) is more acidic than phenol \((\mathrm{pKa}=10)\). This is due to the greater resonance stabilization in the acetate ion compared to the phenoxide ion. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323718
Assertion : Peracids are stronger acids than corresponding carboxylic acids. Reason : The anion of carboxylic acids is stabilised by resonance but not that of peracids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Correct assertion: Peracids are weaker acids than corresponding carboxylic acids.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323719
The correct order for the acidic character of the following carboxylic acids is:
1 IV \(>\) I \(>\) II \(>\) III \(>\) V
2 V \(>\) II \(>\) IV \(>\) I \(>\) III
3 V \(>\) II \(>\) III \(>\) I \(>\) IV
4 None of these
Explanation:
In option \({\text{(V)}}\) the conjugate base is stabilized by intramoleculaar \(\mathrm{H}\)-bonding from 2 ends. Options II & IV have ortho effect. Option III is least due to \(+\mathrm{M}\) effect of \(-\mathrm{OH}\) group.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323720
The strongest acid amongst the following compounds is
\({\rm{ - I}}\) effect exerting (electron withdrawing) groups increases the acidic strength of an acid by withdrawing electron density toward itself, thereby weakening \(\mathrm{O}-\mathrm{H}\) bond; thus, the release of \(\mathrm{H}^{+}\)ion by an acid becomes easier. However, +I effect exerting ( \(e^{-}\)releasing) groups decreases the acidic strength by donating electron density to O-atom. Further, -I effect decreases with distance. Thus, the acidic strength of the given acids would be
Hence, is the most acidic and the strongest acid than other given compounds.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323721
The correct decreasing order for acid strength is
Order of electron withdrawing effect exerting group is \(-\mathrm{NO}_{2}>-\mathrm{CN}>\mathrm{F}>-\mathrm{Cl}\). Hence, the acid strength order is \(\mathrm{NO}_{2} \mathrm{NCH}_{2} \mathrm{COOH}>\mathrm{NCCH}_{2} \mathrm{COOH}>\) \(\mathrm{FCH}_{2} \mathrm{COOH}>\mathrm{ClCH}_{2} \mathrm{COOH}\). acidic strength \({\rm{\alpha }}\frac{{\rm{1}}}{{{\rm{ - 'I'}}\,\,{\rm{effect}}}}\)
