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Practice each question, then open the answer or worked solution.
In which of the following compounds the carbon marked with an asterisk is
expected to have the greatest positive charge?
Option (i) is the answer.
Ionic species are stabilised by the dispersal of charge. Which of the
following carboxylate ion is the most stable?
Option (iv) is the answer.
Electrophilic addition reactions proceed in two steps. The first step
involves the addition of an electrophile. Name the type of intermediate
formed in the first step of the following addition reaction.
H3
C—HC = CH2 + H+ →?
(i) 2° Carbanion
(ii) 1° Carbocation
(iii) 2° Carbocation
(iv) 1° Carbanion
Option (iii) is the answer.
A covalent bond can undergo fission in two different ways. The correct
representation involving heterolytic fission of CH3—Br is
Option (ii) is the answer.
The addition of HCl to alkene proceeds in two steps. The first step is the
attack of H+ ion C=C to a portion which can be shown as
Option (ii) is the answer.