IB Chemistry SL 3.4.3 Heterolytic Fission Question Bank

Practise IB Chemistry SL 3.4.3 Heterolytic Fission with focused questions on curly-arrow electron movement, reactants and products.

Exam points

move both bonding electrons to one atom using a full double-barbed curly arrow
assign a negative charge to the fragment receiving the pair and positive to the other
distinguish ionic heterolysis from radical-forming homolysis in equations and diagrams

[Maximum number: 1]

Which row correctly shows heterolytic fission?

$\mathrm{Br} \underset{\mathrm{Br}}{\curvearrowleft} \rightarrow \mathrm{Br}^{+}+\mathrm{Br}^{-}$

$\mathrm{Br} \underset{\mathrm{Br}}{\curvearrowleft} \rightarrow 2 \mathrm{Br}$ .

$\mathrm{Br} \stackrel{\mathrm{Br}}{\mathrm{Br}} \rightarrow \mathrm{Br}^{+}+\mathrm{Br}^{-}$

$\mathrm{Br} \stackrel{\mathrm{Br}}{\mathrm{Br}} \rightarrow 2 \mathrm{Br}$ .

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