Chemistry 9701 · AS & A Level · States of matter

States of matter — practice question

(a)[4]

State the relative basicities of ammonia, $\text{NH}_3$, propanamide, $\text{CH}_3\text{CH}_2\text{CONH}_2$, and propylamine, $\text{CH}_3\text{CH}_2\text{CH}_2\text{NH}_2$. Explain your answer.

(b)[3]

Fig. 4.1 presents two alternative syntheses of propylamine. Identify compounds K and L and reagent M from Fig. 4.1.

(c)[4]

Compound N is shown in Fig. 4.2. It is treated with an excess of concentrated $\text{HCl (aq)}$. N undergoes complete hydrolysis to produce three organic products. The products are separated from the reaction mixture at $\text{pH }4$. Draw the structures of the three organic products at $\text{pH }4$. Assume that the $\text{CH}_3\text{O}-$ group does not react.

(d(i))[1]

Step 1 is a reduction. Complete the equation for this reaction. Use $[\text{H}]$ to represent one atom of hydrogen from the reducing agent. $\text{C}_7\text{H}_7\text{NO}_2 + \ldots$

(d(ii))[6]

Complete Table 4.1 with the details for each step in the synthesis shown in Fig. 4.3.

Worked solution & mark scheme

This 18-mark question has a full step-by-step worked solution and mark scheme. One marking point: Basicity sequence: propanamide < ammonia < propylamine

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