UNIT 4

This question is about four organic compounds each with five carbon atoms but different functional groups.

Which of these, when mixed with water, produces the solution with the lowest pH?

• compound 1

• compound 2

• compound 3

• compound 4

This question is about four organic compounds each with five carbon atoms but different functional groups.

Which of these reacts with ethylamine, CH₃CH₂NH₂, to form an N-substituted amide?

• compound 1

• compound 2

• compound 3

• compound 4

This question is about four organic compounds each with five carbon atoms but different functional groups.

Which of these reacts with iodine and sodium hydroxide in solution to produce a pale yellow precipitate?

• compound 1

• compound 2

• compound 3

• compound 4

Which of these molecules can rotate the plane of plane-polarised light?

• H₂NCH₂COOH

• HOCH₂CH₂COOH

• ClCH₂C(CH₃)(Cl)COOH

• H₂NC(CH₃)₂COOH

Which of these molecules can rotate the plane of plane-polarised light?

• H₂NCH₂COOH

• HOCH₂CH₂COOH

• ClCH₂C(CH₃)(Cl)COOH

• H₂NC(CH₃)₂COOH

A polymer is prepared by the reaction between hexanedioyl dichloride and

hexane-1-6-diamine.

What type of polymerisation occurs?

• addition

• condensation

• hydrolysis

• substitution

The compound HOOCCH = CHCOOH reacts with excess sodium hydroxide solution.

What is the organic product formed in the reaction?

• NaOOCCH = CHCOONa

• HOOCCH = CHCOONa

• NaOOCC(OH)HC(OH)HCOONa

• NaOOCCH = CHCHO

Which of these reacts directly with ethanoic acid to form ethanoyl chloride?

• chlorine

• chloroethane

• hydrogen chloride

• phosphorus( V ) chloride

Which of these changes has the largest increase in the entropy of the system?

• Hg(l) → Hg(g)

• H O(l) + HCl(g) → H O+(aq) + Cl–(aq)

• C(graphite) → C(diamond)

• almost all Y and Z

• almost all W and X

• W, X, Y and Z but there is less Y and Z than W and X

• W, X, Y and Z but there is more Y and Z than W and X