The most stable carbocation is t-alkyl carbocation the order of stability of alkyl carbocation is ter-alkyl $>$ sec $>$ alkyl $>$ pri-alkyl $>\mathrm{CH}_{3}^{+}$carbocation. This stability order is described with the help of hyper conjugation and inductive effect.
AIPMT -2005
GENERAL ORGANIC CHEMISTRY
231574
Which of the following group is sharp ortho and para directive?
1 $-\mathrm{C}_{6} \mathrm{H}_{5}$
2 $-\mathrm{OH}$
3 $\mathrm{CH}_{3}$
4 $-\mathrm{Cl}$
Explanation:
When $\mathrm{C}_{6} \mathrm{H}_{5}$ attached to other benzene ring the both ring is delocalized and both have $o$ and $p$ directing when $-\mathrm{O}-\mathrm{H}$ attached to benzene ring it is sharp ortho para directing group because it have free electron to donate in benzene ring.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
231580
Nucleophilicity is highest for
1 $\mathrm{NH}_{2}^{-}$
2 $\mathrm{CH}_{3}^{-}$
3 $\mathrm{Cl}^{-}$
4 $\overline{\mathrm{O}} \mathrm{H}$
Explanation:
A less electronegative atom is more nucleophilic. Thus, nucleophilicity is highest for $\mathrm{CH}_{3}^{-}$ among the given.
UP CPMT-2014
GENERAL ORGANIC CHEMISTRY
231584
Which one of the following is not a nitro derivative?
The most stable carbocation is t-alkyl carbocation the order of stability of alkyl carbocation is ter-alkyl $>$ sec $>$ alkyl $>$ pri-alkyl $>\mathrm{CH}_{3}^{+}$carbocation. This stability order is described with the help of hyper conjugation and inductive effect.
AIPMT -2005
GENERAL ORGANIC CHEMISTRY
231574
Which of the following group is sharp ortho and para directive?
1 $-\mathrm{C}_{6} \mathrm{H}_{5}$
2 $-\mathrm{OH}$
3 $\mathrm{CH}_{3}$
4 $-\mathrm{Cl}$
Explanation:
When $\mathrm{C}_{6} \mathrm{H}_{5}$ attached to other benzene ring the both ring is delocalized and both have $o$ and $p$ directing when $-\mathrm{O}-\mathrm{H}$ attached to benzene ring it is sharp ortho para directing group because it have free electron to donate in benzene ring.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
231580
Nucleophilicity is highest for
1 $\mathrm{NH}_{2}^{-}$
2 $\mathrm{CH}_{3}^{-}$
3 $\mathrm{Cl}^{-}$
4 $\overline{\mathrm{O}} \mathrm{H}$
Explanation:
A less electronegative atom is more nucleophilic. Thus, nucleophilicity is highest for $\mathrm{CH}_{3}^{-}$ among the given.
UP CPMT-2014
GENERAL ORGANIC CHEMISTRY
231584
Which one of the following is not a nitro derivative?
The most stable carbocation is t-alkyl carbocation the order of stability of alkyl carbocation is ter-alkyl $>$ sec $>$ alkyl $>$ pri-alkyl $>\mathrm{CH}_{3}^{+}$carbocation. This stability order is described with the help of hyper conjugation and inductive effect.
AIPMT -2005
GENERAL ORGANIC CHEMISTRY
231574
Which of the following group is sharp ortho and para directive?
1 $-\mathrm{C}_{6} \mathrm{H}_{5}$
2 $-\mathrm{OH}$
3 $\mathrm{CH}_{3}$
4 $-\mathrm{Cl}$
Explanation:
When $\mathrm{C}_{6} \mathrm{H}_{5}$ attached to other benzene ring the both ring is delocalized and both have $o$ and $p$ directing when $-\mathrm{O}-\mathrm{H}$ attached to benzene ring it is sharp ortho para directing group because it have free electron to donate in benzene ring.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
231580
Nucleophilicity is highest for
1 $\mathrm{NH}_{2}^{-}$
2 $\mathrm{CH}_{3}^{-}$
3 $\mathrm{Cl}^{-}$
4 $\overline{\mathrm{O}} \mathrm{H}$
Explanation:
A less electronegative atom is more nucleophilic. Thus, nucleophilicity is highest for $\mathrm{CH}_{3}^{-}$ among the given.
UP CPMT-2014
GENERAL ORGANIC CHEMISTRY
231584
Which one of the following is not a nitro derivative?
The most stable carbocation is t-alkyl carbocation the order of stability of alkyl carbocation is ter-alkyl $>$ sec $>$ alkyl $>$ pri-alkyl $>\mathrm{CH}_{3}^{+}$carbocation. This stability order is described with the help of hyper conjugation and inductive effect.
AIPMT -2005
GENERAL ORGANIC CHEMISTRY
231574
Which of the following group is sharp ortho and para directive?
1 $-\mathrm{C}_{6} \mathrm{H}_{5}$
2 $-\mathrm{OH}$
3 $\mathrm{CH}_{3}$
4 $-\mathrm{Cl}$
Explanation:
When $\mathrm{C}_{6} \mathrm{H}_{5}$ attached to other benzene ring the both ring is delocalized and both have $o$ and $p$ directing when $-\mathrm{O}-\mathrm{H}$ attached to benzene ring it is sharp ortho para directing group because it have free electron to donate in benzene ring.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
231580
Nucleophilicity is highest for
1 $\mathrm{NH}_{2}^{-}$
2 $\mathrm{CH}_{3}^{-}$
3 $\mathrm{Cl}^{-}$
4 $\overline{\mathrm{O}} \mathrm{H}$
Explanation:
A less electronegative atom is more nucleophilic. Thus, nucleophilicity is highest for $\mathrm{CH}_{3}^{-}$ among the given.
UP CPMT-2014
GENERAL ORGANIC CHEMISTRY
231584
Which one of the following is not a nitro derivative?
