231622
In which of the following ways does the hydride ion tend to function?
1 An electrophile
2 A nucleophile
3 A free radical
4 An acid
Explanation:
Hydride ion act as a nucleophile. Because it have one extra electron. It can donate the electrophile hence the hydride ion $\left(\mathrm{H}^{-}\right)$tend to a nucleophile function.
UPTU/ UPSEE-2009
GENERAL ORGANIC CHEMISTRY
231623
Electromeric effect is
1 Permanent effect
2 Temporary effect
3 Resonance effect
4 Inductive effect
Explanation:
Electromeric effect occurs only in the presence of attacking reagent. It exists only on the demand of attacking regent. This effect is temporary and takes place only in the presence of a reagent. As soon as the reagent is removed, the molecule reverts back to its original position.
UPTU/ UPSEE-2009
GENERAL ORGANIC CHEMISTRY
231629
The basicity of aniline is weaker in compare to that of methyl amine due to
1 hyperconjugative effect of Me-group in $\mathrm{MeNH}_{2}$
2 resonance effect of phenyl group in aniline
3 lower molecular weight of Methyl amine as compared to that of aniline
4 resonance effect of $-\mathrm{NH}_{2}$ group in $\mathrm{MeNH}_{2}$
Explanation:
The basicity of aniline is weaker than Methyl amine because in aniline the lone pair electron of nitrogen is delocalized in benzene ring. Here the electron in not free for sharing. Thus it affected by resonance by delocalization. So, it is less basic than methyl amine.
WB JEET-2012
GENERAL ORGANIC CHEMISTRY
231631
Which one of the following characteristics belongs to an electrophile?
1 It is any species having electron deficiency which reacts at an electron rich C-centre
2 It is any species having electron enrichment, that reacts at an electron deficient C-centre
3 It is cationic in nature
4 It is anionic in nature
Explanation:
Electrophile is a electron deficient species means it have either $(+)$ charge or vacant orbital or its octate is not complete. They attack on electron rich Catom.
231622
In which of the following ways does the hydride ion tend to function?
1 An electrophile
2 A nucleophile
3 A free radical
4 An acid
Explanation:
Hydride ion act as a nucleophile. Because it have one extra electron. It can donate the electrophile hence the hydride ion $\left(\mathrm{H}^{-}\right)$tend to a nucleophile function.
UPTU/ UPSEE-2009
GENERAL ORGANIC CHEMISTRY
231623
Electromeric effect is
1 Permanent effect
2 Temporary effect
3 Resonance effect
4 Inductive effect
Explanation:
Electromeric effect occurs only in the presence of attacking reagent. It exists only on the demand of attacking regent. This effect is temporary and takes place only in the presence of a reagent. As soon as the reagent is removed, the molecule reverts back to its original position.
UPTU/ UPSEE-2009
GENERAL ORGANIC CHEMISTRY
231629
The basicity of aniline is weaker in compare to that of methyl amine due to
1 hyperconjugative effect of Me-group in $\mathrm{MeNH}_{2}$
2 resonance effect of phenyl group in aniline
3 lower molecular weight of Methyl amine as compared to that of aniline
4 resonance effect of $-\mathrm{NH}_{2}$ group in $\mathrm{MeNH}_{2}$
Explanation:
The basicity of aniline is weaker than Methyl amine because in aniline the lone pair electron of nitrogen is delocalized in benzene ring. Here the electron in not free for sharing. Thus it affected by resonance by delocalization. So, it is less basic than methyl amine.
WB JEET-2012
GENERAL ORGANIC CHEMISTRY
231631
Which one of the following characteristics belongs to an electrophile?
1 It is any species having electron deficiency which reacts at an electron rich C-centre
2 It is any species having electron enrichment, that reacts at an electron deficient C-centre
3 It is cationic in nature
4 It is anionic in nature
Explanation:
Electrophile is a electron deficient species means it have either $(+)$ charge or vacant orbital or its octate is not complete. They attack on electron rich Catom.
231622
In which of the following ways does the hydride ion tend to function?
1 An electrophile
2 A nucleophile
3 A free radical
4 An acid
Explanation:
Hydride ion act as a nucleophile. Because it have one extra electron. It can donate the electrophile hence the hydride ion $\left(\mathrm{H}^{-}\right)$tend to a nucleophile function.
UPTU/ UPSEE-2009
GENERAL ORGANIC CHEMISTRY
231623
Electromeric effect is
1 Permanent effect
2 Temporary effect
3 Resonance effect
4 Inductive effect
Explanation:
Electromeric effect occurs only in the presence of attacking reagent. It exists only on the demand of attacking regent. This effect is temporary and takes place only in the presence of a reagent. As soon as the reagent is removed, the molecule reverts back to its original position.
UPTU/ UPSEE-2009
GENERAL ORGANIC CHEMISTRY
231629
The basicity of aniline is weaker in compare to that of methyl amine due to
1 hyperconjugative effect of Me-group in $\mathrm{MeNH}_{2}$
2 resonance effect of phenyl group in aniline
3 lower molecular weight of Methyl amine as compared to that of aniline
4 resonance effect of $-\mathrm{NH}_{2}$ group in $\mathrm{MeNH}_{2}$
Explanation:
The basicity of aniline is weaker than Methyl amine because in aniline the lone pair electron of nitrogen is delocalized in benzene ring. Here the electron in not free for sharing. Thus it affected by resonance by delocalization. So, it is less basic than methyl amine.
WB JEET-2012
GENERAL ORGANIC CHEMISTRY
231631
Which one of the following characteristics belongs to an electrophile?
1 It is any species having electron deficiency which reacts at an electron rich C-centre
2 It is any species having electron enrichment, that reacts at an electron deficient C-centre
3 It is cationic in nature
4 It is anionic in nature
Explanation:
Electrophile is a electron deficient species means it have either $(+)$ charge or vacant orbital or its octate is not complete. They attack on electron rich Catom.
231622
In which of the following ways does the hydride ion tend to function?
1 An electrophile
2 A nucleophile
3 A free radical
4 An acid
Explanation:
Hydride ion act as a nucleophile. Because it have one extra electron. It can donate the electrophile hence the hydride ion $\left(\mathrm{H}^{-}\right)$tend to a nucleophile function.
UPTU/ UPSEE-2009
GENERAL ORGANIC CHEMISTRY
231623
Electromeric effect is
1 Permanent effect
2 Temporary effect
3 Resonance effect
4 Inductive effect
Explanation:
Electromeric effect occurs only in the presence of attacking reagent. It exists only on the demand of attacking regent. This effect is temporary and takes place only in the presence of a reagent. As soon as the reagent is removed, the molecule reverts back to its original position.
UPTU/ UPSEE-2009
GENERAL ORGANIC CHEMISTRY
231629
The basicity of aniline is weaker in compare to that of methyl amine due to
1 hyperconjugative effect of Me-group in $\mathrm{MeNH}_{2}$
2 resonance effect of phenyl group in aniline
3 lower molecular weight of Methyl amine as compared to that of aniline
4 resonance effect of $-\mathrm{NH}_{2}$ group in $\mathrm{MeNH}_{2}$
Explanation:
The basicity of aniline is weaker than Methyl amine because in aniline the lone pair electron of nitrogen is delocalized in benzene ring. Here the electron in not free for sharing. Thus it affected by resonance by delocalization. So, it is less basic than methyl amine.
WB JEET-2012
GENERAL ORGANIC CHEMISTRY
231631
Which one of the following characteristics belongs to an electrophile?
1 It is any species having electron deficiency which reacts at an electron rich C-centre
2 It is any species having electron enrichment, that reacts at an electron deficient C-centre
3 It is cationic in nature
4 It is anionic in nature
Explanation:
Electrophile is a electron deficient species means it have either $(+)$ charge or vacant orbital or its octate is not complete. They attack on electron rich Catom.
