Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

For each part of this question, select the answer or answers from the options provided.
(a(i))[1]

Identify the two particles formed when methane reacts with chlorine in UV light.

(a(ii))[1]

Identify the two particles formed when a bond in chloromethane undergoes heterolytic fission.

(b(i))[1]

Name the reaction type that occurs when Tollens’ reagent is used to test for an aldehyde.

(b(ii))[1]

Name the reaction type involved in using $2,4$-DNPH to test for a carbonyl group.

(b(iii))[1]

Name the reaction type involved when a ketone reacts with $\text{NaBH}_4$.

(b(iv))[1]

Name the reaction type involved when an aldehyde reacts with $\text{HCN}$.

(a)

The six particles listed are: $\text{H}\cdot$, $\text{H}^+$, $\text{Cl}\cdot$, $\text{Cl}^-$, $\cdot\text{CH}_3$, $^+\text{CH}_3$.

(b)

The seven reaction types listed are: addition, substitution, oxidation, elimination, hydrolysis, condensation, reduction.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: $\cdot CH_3$ and $Cl\cdot$

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