Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

TopicSkillDifficulty

12 questions

SA-AC-CO-0011 markL1 FoundationCalculatorPolyesters

A polyester is formed from

Salam Academy Original Practice · Proposed mark scheme

SA-AC-CO-0121 markL1 FoundationCalculatorPolyamides

The link in a polyamide is

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SA-AC-CO-0021 markL2 StandardCalculatorPolyamides

Nylon-6,6 is formed from hexanedioic acid and

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SA-AC-CO-0031 markL2 StandardCalculatorPolyesters

The small molecule lost when a diol reacts with a diacyl chloride is

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SA-AC-CO-0041 markL2 StandardCalculatorPolyamides

Kevlar is very strong because

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SA-AC-CO-0052 marksL2 StandardCalculatorPolyamides

Calculate

M_r

of the nylon-6,6 repeat unit,

\mathrm{C_{12}H_{22}N_2O_2}

. (C 12, H 1, N 14, O 16)

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SA-AC-CO-0061 markL2 StandardCalculatorDegradation

Condensation polymers can be hydrolysed because

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SA-AC-CO-0071 markL2 StandardCalculatorDegradation

Alkaline hydrolysis of a polyester gives

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SA-AC-CO-0081 markL2 StandardCalculatorPolyesters

Poly(lactic acid) is made from a single monomer containing

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SA-AC-CO-0101 markL2 StandardCalculatorDegradation

Which monomer pair gives an addition polymer, not a condensation polymer?

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SA-AC-CO-0091 markL3 ExamCalculatorDegradation

A polymer chain contains repeating –NH–CH(CH₃)–CO– units. Its monomer is

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SA-AC-CO-0112 marksL3 ExamCalculatorPolyesters

How many water molecules are released when 100 molecules of diol react with 100 molecules of dicarboxylic acid to form one long polyester chain (ignore chain ends)?

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