231543
The elution sequence of a mixture of compounds containing chlorobenzene, anthracene and p-cresol developed of an alumina column using a solvent system of progressively increasing polarity is
1 anthracene, chlorobenzene, p-cresol
2 anthracene, p-cresol, chlorobenzene
3 chlorobenzene, p-creasol, anthracene
4 chlorobenzene, anthracene, p-cresol
5 p-cresol, anthracene, chlorobenzene
Explanation:
Alumina column having suitable solvent elutes the species based on their nature of polarity. Less polar species adsorb first and more polar there after. Thus the correct order is. Anthrancene, Chlorobenzene, p-cresol.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
231544
The strongest base among the following is
1 $\mathrm{NH}_{2}^{-}$
2 $\mathrm{OH}^{-}$
3 $\mathrm{CH}=\mathrm{C}^{-}$
4 $\mathrm{CH}_{3} \mathrm{CH}_{2}^{-}$
5 $\mathrm{OEt}^{-}$
Explanation:
(A): The strongest base is $\mathrm{NH}_{2}^{-}$. It is a conjugate base of $\mathrm{NH}_{3} \mathrm{OH}^{\ominus}$. So $\mathrm{NH}_{2}^{-}$is a strongest base.
Kerala CEE-2019
GENERAL ORGANIC CHEMISTRY
231553
Which of the following compounds has the most acidic nature?
1
2
3
4
Explanation:
Delocalisation of phenoride ion increase the acidity of alcohol phenol, hence phenol is most acidic in nature, because by delocalisation of $-\mathrm{O}-\mathrm{H}$ bond of phenol is easily break. The order of acidity is
AIPMT -2010
GENERAL ORGANIC CHEMISTRY
231563
Which one of the following is most reactive towards electrophilic reagent?
1
2
3
4
Explanation:
All option have - $\mathrm{CH}_{3}$ group which has same effect for all $-\mathrm{OCH}_{3}$ have highest tendecy to donate electron have $\mathrm{NHCOCH}_{3}$ attract electron towards itself. Hence O-cresol most reactive for electrophillic substitution reaction.
231543
The elution sequence of a mixture of compounds containing chlorobenzene, anthracene and p-cresol developed of an alumina column using a solvent system of progressively increasing polarity is
1 anthracene, chlorobenzene, p-cresol
2 anthracene, p-cresol, chlorobenzene
3 chlorobenzene, p-creasol, anthracene
4 chlorobenzene, anthracene, p-cresol
5 p-cresol, anthracene, chlorobenzene
Explanation:
Alumina column having suitable solvent elutes the species based on their nature of polarity. Less polar species adsorb first and more polar there after. Thus the correct order is. Anthrancene, Chlorobenzene, p-cresol.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
231544
The strongest base among the following is
1 $\mathrm{NH}_{2}^{-}$
2 $\mathrm{OH}^{-}$
3 $\mathrm{CH}=\mathrm{C}^{-}$
4 $\mathrm{CH}_{3} \mathrm{CH}_{2}^{-}$
5 $\mathrm{OEt}^{-}$
Explanation:
(A): The strongest base is $\mathrm{NH}_{2}^{-}$. It is a conjugate base of $\mathrm{NH}_{3} \mathrm{OH}^{\ominus}$. So $\mathrm{NH}_{2}^{-}$is a strongest base.
Kerala CEE-2019
GENERAL ORGANIC CHEMISTRY
231553
Which of the following compounds has the most acidic nature?
1
2
3
4
Explanation:
Delocalisation of phenoride ion increase the acidity of alcohol phenol, hence phenol is most acidic in nature, because by delocalisation of $-\mathrm{O}-\mathrm{H}$ bond of phenol is easily break. The order of acidity is
AIPMT -2010
GENERAL ORGANIC CHEMISTRY
231563
Which one of the following is most reactive towards electrophilic reagent?
1
2
3
4
Explanation:
All option have - $\mathrm{CH}_{3}$ group which has same effect for all $-\mathrm{OCH}_{3}$ have highest tendecy to donate electron have $\mathrm{NHCOCH}_{3}$ attract electron towards itself. Hence O-cresol most reactive for electrophillic substitution reaction.
231543
The elution sequence of a mixture of compounds containing chlorobenzene, anthracene and p-cresol developed of an alumina column using a solvent system of progressively increasing polarity is
1 anthracene, chlorobenzene, p-cresol
2 anthracene, p-cresol, chlorobenzene
3 chlorobenzene, p-creasol, anthracene
4 chlorobenzene, anthracene, p-cresol
5 p-cresol, anthracene, chlorobenzene
Explanation:
Alumina column having suitable solvent elutes the species based on their nature of polarity. Less polar species adsorb first and more polar there after. Thus the correct order is. Anthrancene, Chlorobenzene, p-cresol.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
231544
The strongest base among the following is
1 $\mathrm{NH}_{2}^{-}$
2 $\mathrm{OH}^{-}$
3 $\mathrm{CH}=\mathrm{C}^{-}$
4 $\mathrm{CH}_{3} \mathrm{CH}_{2}^{-}$
5 $\mathrm{OEt}^{-}$
Explanation:
(A): The strongest base is $\mathrm{NH}_{2}^{-}$. It is a conjugate base of $\mathrm{NH}_{3} \mathrm{OH}^{\ominus}$. So $\mathrm{NH}_{2}^{-}$is a strongest base.
Kerala CEE-2019
GENERAL ORGANIC CHEMISTRY
231553
Which of the following compounds has the most acidic nature?
1
2
3
4
Explanation:
Delocalisation of phenoride ion increase the acidity of alcohol phenol, hence phenol is most acidic in nature, because by delocalisation of $-\mathrm{O}-\mathrm{H}$ bond of phenol is easily break. The order of acidity is
AIPMT -2010
GENERAL ORGANIC CHEMISTRY
231563
Which one of the following is most reactive towards electrophilic reagent?
1
2
3
4
Explanation:
All option have - $\mathrm{CH}_{3}$ group which has same effect for all $-\mathrm{OCH}_{3}$ have highest tendecy to donate electron have $\mathrm{NHCOCH}_{3}$ attract electron towards itself. Hence O-cresol most reactive for electrophillic substitution reaction.
231543
The elution sequence of a mixture of compounds containing chlorobenzene, anthracene and p-cresol developed of an alumina column using a solvent system of progressively increasing polarity is
1 anthracene, chlorobenzene, p-cresol
2 anthracene, p-cresol, chlorobenzene
3 chlorobenzene, p-creasol, anthracene
4 chlorobenzene, anthracene, p-cresol
5 p-cresol, anthracene, chlorobenzene
Explanation:
Alumina column having suitable solvent elutes the species based on their nature of polarity. Less polar species adsorb first and more polar there after. Thus the correct order is. Anthrancene, Chlorobenzene, p-cresol.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
231544
The strongest base among the following is
1 $\mathrm{NH}_{2}^{-}$
2 $\mathrm{OH}^{-}$
3 $\mathrm{CH}=\mathrm{C}^{-}$
4 $\mathrm{CH}_{3} \mathrm{CH}_{2}^{-}$
5 $\mathrm{OEt}^{-}$
Explanation:
(A): The strongest base is $\mathrm{NH}_{2}^{-}$. It is a conjugate base of $\mathrm{NH}_{3} \mathrm{OH}^{\ominus}$. So $\mathrm{NH}_{2}^{-}$is a strongest base.
Kerala CEE-2019
GENERAL ORGANIC CHEMISTRY
231553
Which of the following compounds has the most acidic nature?
1
2
3
4
Explanation:
Delocalisation of phenoride ion increase the acidity of alcohol phenol, hence phenol is most acidic in nature, because by delocalisation of $-\mathrm{O}-\mathrm{H}$ bond of phenol is easily break. The order of acidity is
AIPMT -2010
GENERAL ORGANIC CHEMISTRY
231563
Which one of the following is most reactive towards electrophilic reagent?
1
2
3
4
Explanation:
All option have - $\mathrm{CH}_{3}$ group which has same effect for all $-\mathrm{OCH}_{3}$ have highest tendecy to donate electron have $\mathrm{NHCOCH}_{3}$ attract electron towards itself. Hence O-cresol most reactive for electrophillic substitution reaction.
