EXERCISE

The correct order of the increasing basic nature of the following base is

Write the basicity order of the following:

The most stable carbocation is

Which of the following represents the correct order of stability of carbocations?
 

Consider the following three halides:
($\mathrm{i}$) ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{Cl}$
($\mathrm{ii}$) ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{Cl}$
($\mathrm{iii}$)${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{Cl}$
Arrange the $\mathrm{C}-\mathrm{Cl}$ bond length of these compounds in the decreasing order.

Which of the following group can exert both the $+\mathrm{M}$ and $-\mathrm{I}$ effect?

In which of the following pairs of carbocations, the first carbocation is more stable than the second?
($\mathrm{i}$) ${\mathrm{CH}}_2=\mathrm{CH}-\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$ and ${\mathrm{CH}}_2=\mathrm{CH}-{\mathrm{CH}}_2-\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$
($\mathrm{ii}$) ${\mathrm{CH}}_3-\mathrm{NH}-\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$ and $\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2-\mathrm{OH}$
($\mathrm{iii}$) ${\mathrm{CH}}_3-\mathrm{O}-{\mathrm{CH}}_2-\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$ and ${\mathrm{CH}}_3-\mathrm{O}-\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$
($\mathrm{iv}$) ${\mathrm{CH}}_3-\stackrel{+}{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$ and ${\mathrm{CH}}_3{\mathrm{CH}}_2-\stackrel{+}{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_2{\mathrm{CH}}_3$

Which of the following shows the correct order of decreasing stability?