Related Questions
Electromeric effect is
Permanent effect
Temporary effect
Resonance effect
Inductive effect
Arrange the following groups in decreasing order of their -M effect: -NO2, -CN, -COOH, -COOR
-NO2 > -CN > -COOH > -COOR
-CN > -NO2 > -COOH > -COOR
-COOH > -COOR > -NO2 > -CN
-COOR > -COOH > -CN > -NO2
Which of the following does not have a resonance structure?
Benzene
Benzaldehyde
Acetaldehyde
Benzylamine
The stability of
$\begin{array}{l}
\mathop {{\rm{C}}{{\rm{H}}3} - {\rm{CH}} = {\rm{CH}} - {\rm{C}}{{\rm{H}}3},{\rm{C}}{{\rm{H}}3}}\limits{(I)} - \mathop {\mathop {\mathop {\rm{C}}\limits| }\limits{C{H_3}} = \mathop {\mathop {\rm{C}}\limits_| }\limits_{C{H_3}} - {\rm{C}}{{\rm{H}}3}}\limits{(II)} \
\mathop {{\rm{C}}{{\rm{H}}3} - \mathop {\mathop {\rm{C}}\limits| }\limits_{C{H_3}} = {\rm{C}}{{\rm{H}}2}}\limits{(III)} {\rm{;;;;}}\mathop {{\rm{C}}{{\rm{H}}3} - \mathop {\mathop {\rm{C}}\limits| }\limits_{C{H_3}} = {\rm{CH}} - {\rm{C}}{{\rm{H}}3}}\limits{(IV)}
\end{array}$
In the increasing order is
Which of the following alkene is maximum stable
The hyperconjugation effect involves the delocalization of:
π electrons
σ electrons of C-H bond
Lone pair electrons
None of the above
Which of the following does not have a resonance structure?
Benzene
Benzaldehyde
Acetaldehyde
Benzylamine
Which factor DOES NOT contribute to the greater stability of a tertiary butyl carbocation compared to a secondary butyl carbocation?
Steric hindrance
+I effect
Hyperconjugation
+I effect and Hyperconjugation
Which group has the maximum-Inductive effect?
Which of the following statements is INCORRECT regarding the mesomeric effect?
It involves the delocalization of π electrons or lone pairs
It operates only in conjugated systems
It can be positive (+M/+R) or negative (-M/-R)
It is a temporary effect
