Chemistry 0620 · IGCSE · Group VII properties

Group VII properties — practice question

Chlorine, bromine and iodine belong to the halogen group.
(a)[4]

Calculate the volume of $8.00\ \text{mol dm}^{-3}$ HCl(aq) required to react with $3.48\ \text{g}$ of MnO$_2$.

(b(i))[2]

Describe the colour change observed in the test-tube. from ... to ...

(b(ii))[3]

Complete the ionic equation for this reaction. Include state symbols. $\text{Cl}_2\text{(g)} + \dots\text{Br}^-\text{(aq)} \rightarrow \dots + \dots$

(c(i))[1]

Which part of the propene molecule reacts with bromine?

(c(ii))[1]

What is the name of the reaction type that occurs between bromine and propene?

(d(i))[1]

What is the name of the reaction type that occurs between chlorine and propane?

(d(ii))[2]

Explain what is meant by the term structural isomers.

(d(iii))[2]

Draw the structures of the two structural isomers produced when $1$ mole of chlorine reacts with $1$ mole of propane.

(e(i))[3]

Use this information to work out the empirical formula of this iodine oxide.

(e(ii))[2]

Predict and explain what happens when Universal Indicator is added to an aqueous solution of this iodine oxide.

Worked solution & mark scheme

This 21-mark question has a full step-by-step worked solution and mark scheme. One marking point: Mr for MnO₂ is 87

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