A chemical reaction is one in which old bonds are broken and new bonds are
made. During the course of these changes a variety of intermediates are formed
before a starting material is converted to final products. Formation of these
intermediates depend on several factors like bond energies, kinetics of the
reactions etc.
In which of the following choices, the correct order is not indicated.
(a) \(\mathrm{F}^{-}<\mathrm{Cl}^{-}<\mathrm{Br}^{-}<\mathrm{I}^{-}(\) the order
of base strength \()\)
(b) \(\mathrm{ClCH}_{2}
\underset{\oplus}{\mathrm{C}}\left(\mathrm{CH}_{3}\right)_{2}<\left(\mathrm{CH}_{3}\right)_{3}
\mathrm{C}<\left(\mathrm{CH}_{3}\right)_{2} \mathrm{COCH}_{3}\) (stability of
carbocation)
(c) \(\mathrm{O}_{2}
\mathrm{~N}-\mathrm{CH}_{2}>\mathrm{CH}_{3}>\mathrm{CH}_{3} \mathrm{CH}_{2}\)
(stability of carbanion)
(d) \(\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}<\mathrm{CH}_{3}
\mathrm{CH}=\mathrm{CHCH}_{3}<\left(\mathrm{CH}_{3}\right)_{2}
\mathrm{C}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}\) (stability of alkenes)