15442
Arrange the following compounds in order of decreasing acidity :
1 \(II > IV > I > III\)
2 \(I > II > III > IV\)
3 \(III > I > II > IV\)
4 \(IV > III > I > II\)
Explanation:
Electron releasing group decreases while electron withdrawing group increases acidic strength by destabilising and stabilising the phenoxide ion formed respectively.
ALCOHOLS, PHENOLS AND ETHER
15443
An unknown alcohol is treated with the "Lucas reagent" to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism :
1 secondary alcohol by \({S_{{N^1}}}\)
2 tertiary alcohol by \({S_{{N^1}}}\)
3 secondary alcohol by \({S_{{N^2}}}\)
4 tertiary alcohol by \({S_{{N^2}}}\)
Explanation:
The reaction of alcohol with Lucas reagent is mostly an \({S_{{N^1}}}\) reaction and the rate of reaction is directly proportional to the stability of carbocation formed in the reaction. Since \(3^{o} R-O H\) forms \(3^{o}\) carbocation (most stable), hence it will react fastest.
ALCOHOLS, PHENOLS AND ETHER
15444
Sodium phenoxide when heated with \(CO_2\) under pressure at \(125\,^o C\) yields a product which on acetylation produces \(C.\) The major product \(C\) would be
1
2
3
4
Explanation:
It is a Kolbe Schmidt reaction. The second step of the reaction is an example of acetylation reaction.
ALCOHOLS, PHENOLS AND ETHER
15445
Thiol group is present in :
1 Cysteine
2 Methionine
3 Cytosine
4 Cystine
Explanation:
Thiol group (SH) is present in cysteine
ALCOHOLS, PHENOLS AND ETHER
15446
The product of the reaction given below is :
15442
Arrange the following compounds in order of decreasing acidity :
1 \(II > IV > I > III\)
2 \(I > II > III > IV\)
3 \(III > I > II > IV\)
4 \(IV > III > I > II\)
Explanation:
Electron releasing group decreases while electron withdrawing group increases acidic strength by destabilising and stabilising the phenoxide ion formed respectively.
ALCOHOLS, PHENOLS AND ETHER
15443
An unknown alcohol is treated with the "Lucas reagent" to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism :
1 secondary alcohol by \({S_{{N^1}}}\)
2 tertiary alcohol by \({S_{{N^1}}}\)
3 secondary alcohol by \({S_{{N^2}}}\)
4 tertiary alcohol by \({S_{{N^2}}}\)
Explanation:
The reaction of alcohol with Lucas reagent is mostly an \({S_{{N^1}}}\) reaction and the rate of reaction is directly proportional to the stability of carbocation formed in the reaction. Since \(3^{o} R-O H\) forms \(3^{o}\) carbocation (most stable), hence it will react fastest.
ALCOHOLS, PHENOLS AND ETHER
15444
Sodium phenoxide when heated with \(CO_2\) under pressure at \(125\,^o C\) yields a product which on acetylation produces \(C.\) The major product \(C\) would be
1
2
3
4
Explanation:
It is a Kolbe Schmidt reaction. The second step of the reaction is an example of acetylation reaction.
ALCOHOLS, PHENOLS AND ETHER
15445
Thiol group is present in :
1 Cysteine
2 Methionine
3 Cytosine
4 Cystine
Explanation:
Thiol group (SH) is present in cysteine
ALCOHOLS, PHENOLS AND ETHER
15446
The product of the reaction given below is :
15442
Arrange the following compounds in order of decreasing acidity :
1 \(II > IV > I > III\)
2 \(I > II > III > IV\)
3 \(III > I > II > IV\)
4 \(IV > III > I > II\)
Explanation:
Electron releasing group decreases while electron withdrawing group increases acidic strength by destabilising and stabilising the phenoxide ion formed respectively.
ALCOHOLS, PHENOLS AND ETHER
15443
An unknown alcohol is treated with the "Lucas reagent" to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism :
1 secondary alcohol by \({S_{{N^1}}}\)
2 tertiary alcohol by \({S_{{N^1}}}\)
3 secondary alcohol by \({S_{{N^2}}}\)
4 tertiary alcohol by \({S_{{N^2}}}\)
Explanation:
The reaction of alcohol with Lucas reagent is mostly an \({S_{{N^1}}}\) reaction and the rate of reaction is directly proportional to the stability of carbocation formed in the reaction. Since \(3^{o} R-O H\) forms \(3^{o}\) carbocation (most stable), hence it will react fastest.
ALCOHOLS, PHENOLS AND ETHER
15444
Sodium phenoxide when heated with \(CO_2\) under pressure at \(125\,^o C\) yields a product which on acetylation produces \(C.\) The major product \(C\) would be
1
2
3
4
Explanation:
It is a Kolbe Schmidt reaction. The second step of the reaction is an example of acetylation reaction.
ALCOHOLS, PHENOLS AND ETHER
15445
Thiol group is present in :
1 Cysteine
2 Methionine
3 Cytosine
4 Cystine
Explanation:
Thiol group (SH) is present in cysteine
ALCOHOLS, PHENOLS AND ETHER
15446
The product of the reaction given below is :
15442
Arrange the following compounds in order of decreasing acidity :
1 \(II > IV > I > III\)
2 \(I > II > III > IV\)
3 \(III > I > II > IV\)
4 \(IV > III > I > II\)
Explanation:
Electron releasing group decreases while electron withdrawing group increases acidic strength by destabilising and stabilising the phenoxide ion formed respectively.
ALCOHOLS, PHENOLS AND ETHER
15443
An unknown alcohol is treated with the "Lucas reagent" to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism :
1 secondary alcohol by \({S_{{N^1}}}\)
2 tertiary alcohol by \({S_{{N^1}}}\)
3 secondary alcohol by \({S_{{N^2}}}\)
4 tertiary alcohol by \({S_{{N^2}}}\)
Explanation:
The reaction of alcohol with Lucas reagent is mostly an \({S_{{N^1}}}\) reaction and the rate of reaction is directly proportional to the stability of carbocation formed in the reaction. Since \(3^{o} R-O H\) forms \(3^{o}\) carbocation (most stable), hence it will react fastest.
ALCOHOLS, PHENOLS AND ETHER
15444
Sodium phenoxide when heated with \(CO_2\) under pressure at \(125\,^o C\) yields a product which on acetylation produces \(C.\) The major product \(C\) would be
1
2
3
4
Explanation:
It is a Kolbe Schmidt reaction. The second step of the reaction is an example of acetylation reaction.
ALCOHOLS, PHENOLS AND ETHER
15445
Thiol group is present in :
1 Cysteine
2 Methionine
3 Cytosine
4 Cystine
Explanation:
Thiol group (SH) is present in cysteine
ALCOHOLS, PHENOLS AND ETHER
15446
The product of the reaction given below is :
15442
Arrange the following compounds in order of decreasing acidity :
1 \(II > IV > I > III\)
2 \(I > II > III > IV\)
3 \(III > I > II > IV\)
4 \(IV > III > I > II\)
Explanation:
Electron releasing group decreases while electron withdrawing group increases acidic strength by destabilising and stabilising the phenoxide ion formed respectively.
ALCOHOLS, PHENOLS AND ETHER
15443
An unknown alcohol is treated with the "Lucas reagent" to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism :
1 secondary alcohol by \({S_{{N^1}}}\)
2 tertiary alcohol by \({S_{{N^1}}}\)
3 secondary alcohol by \({S_{{N^2}}}\)
4 tertiary alcohol by \({S_{{N^2}}}\)
Explanation:
The reaction of alcohol with Lucas reagent is mostly an \({S_{{N^1}}}\) reaction and the rate of reaction is directly proportional to the stability of carbocation formed in the reaction. Since \(3^{o} R-O H\) forms \(3^{o}\) carbocation (most stable), hence it will react fastest.
ALCOHOLS, PHENOLS AND ETHER
15444
Sodium phenoxide when heated with \(CO_2\) under pressure at \(125\,^o C\) yields a product which on acetylation produces \(C.\) The major product \(C\) would be
1
2
3
4
Explanation:
It is a Kolbe Schmidt reaction. The second step of the reaction is an example of acetylation reaction.
ALCOHOLS, PHENOLS AND ETHER
15445
Thiol group is present in :
1 Cysteine
2 Methionine
3 Cytosine
4 Cystine
Explanation:
Thiol group (SH) is present in cysteine
ALCOHOLS, PHENOLS AND ETHER
15446
The product of the reaction given below is :
