NEET Chemistry Haloalkanes And Haloarenes MCQs

Which of the following alkyl halides undergoes $S_N1$ solvolysis in aqueous ethanol most rapidly?

Which of the following aryl halides is most reactive towards nucleophilic substitution via the S_N1 mechanism?

Which of the following alkyl halides will undergo $S_N1$ reaction most readily?

Which of the following compounds will undergo an $ext{S}_ext{N}1$ reaction most readily?

Arrange the following alkyl halides in decreasing order of their reactivity towards $ext{S}_ext{N}1$ reaction:

(i) CH$_3$CH$_2$CH$_2$CH$_2$Br

(ii) (CH$_3$)$_3$CBr

(iii) CH$_3$CH$_2$CHBrCH$_3$

(iv) CH$_3$CH$_2$CH$_2$CH$_2$Cl

Which of the following alkyl halides will react fastest in an $ext{S}_ext{N}1$ solvolysis reaction with aqueous ethanol?

Which substrate would be least reactive in an $ext{S}_ext{N}1$ reaction?

Iso-propyl chloride undergoes hydrolysis by

The ${S_N}1$ reactivity of following halides will be in the order

(i) ${\left( {{\rm{C}}{{\rm{H}}_3}} \right)_3}{\rm{CBr}}$ (ii)${\left( {{{\rm{C}}_6}{{\rm{H}}_5}} \right)_2}{\rm{CHBr\;}}$

(iii) ${\left( {{{\rm{C}}_6}{{\rm{H}}_5}} \right)_2}{\rm{C}}\left( {{\rm{C}}{{\rm{H}}_3}} \right){\rm{Br}}$ (iv) ${\left( {{\rm{C}}{{\rm{H}}_3}} \right)_2}{\rm{CHBr}}$

(v) ${\rm{\;}}{{\rm{C}}_2}{{\rm{H}}_5}{\rm{Br}}$

$t$-butyl chloride reacts with ${\rm{O}}{{\rm{H}}^ - }$ by ${{\rm{S}}_{\rm{N}}}1$ mechanism and rate $\propto [t$- buty1 chloride]. One of the reasons for this is that