Umiejętności z tego działu sprawdzają 43 zadania wzorowane na arkuszach IB z lat 2022–2026. Dział pojawia się w 26 z 54 arkuszy w bazie.
Pentan-2-ol can form by reacting pent-1-ene with water in the presence of an acid catalyst. CH2=CHCH2CH2CH3(g) + H2O(l) → CH3CH(OH)CH2CH2CH3(aq) ΔH⊖ = −84 kJ mol−1 (i) The first step of the mechanism for the formation of…
An alloy of magnesium and aluminium is used for car wheels and laptop casings. (i) Suggest why adding aluminium produces a material that is harder and less malleable than magnesium alone. (ii) Suggest why a magnesium alloy is a good choice for the casing of a…
Steel is an alloy of iron with a small percentage of carbon. (i) Outline one reason why steel is harder than pure iron. (ii) State one property of iron, other than hardness, that can be modified by forming an alloy.
A section of the chain of an addition polymer is drawn below. From which monomer is this polymer made? A. CH2=CHCH2CH3 B. CH3CH2CH2CH3 C. CH3CH=CHCH3 D. (CH3)2C=CH2
Which pair of compounds could react together in a condensation reaction that produces water? A. CH3CH2CH3 and Cl2 B. CH3CH=CH2 and HBr C. CH3CH2Cl and NH3 D. CH3CH2COOH and CH3CH2CH2OH
A segment of a condensation polymer is shown. Which statement is correct about one of the monomers from which this polymer is made? A. It is H2N(CH2)6NH2 B. It is H2N(CH2)4NH2 C. It is HOOC(CH2)6COOH D. It is H2N(CH2)5COOH
Outline why solid tin(IV) iodide is classified as a polar covalent compound. Use sections 9 and 17 of the data booklet.
Contrast tin and tin(IV) iodide in terms of one physical property.
Kevlar is a condensation polymer. Deduce the structures of the two monomers from which Kevlar is made.
The displayed formula below shows part of the chain of an addition polymer. (i) Deduce the structural formula of the monomer used to build this polymer. (ii) Describe one chemical property responsible for this type of polymer being a useful material.
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