Physical Science NCV Level 4 — Memo
November 2022 — NCV Level 4 — Physical Science
NCV Level 4
2022
NCV Engineering
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Q1— Section header —
1.1Becquerel
1.2Saturated
1.3Gamma (rays\
1.4Boiling point
1.55
Q2— Section header —
2.55
Q3— Section header —
3.1False Butanoic acid is a weak acid because it ionises partially
3.2True
3.3True
3.4False The intermolecular forces in methanoic acid are stronger than the intermolecular forces in methanol The intermolecular forces in methanol are weaker than the intermolecular forces in methanoic acid
3.510
Q4— Section header —
4.5(5 [15] TOTAL SECTION A: SECTION B15
Q5— Section header —
5.1.1(3\
5.1.2(9,8\(3, (3\
5.2.1reater than
5.2.2The atmosphere will also exert pressure on the liquid/ base (2 (2\
5.3.1emain the same
5.3.210
Q6— Section header —
6.1.1(a\ (1\ (b\ (1\
6.1.2(a\ Alcohol (1\ (b\ Hydroxyl (1\ (c\ methy propan
6.1.3(a\ lcohol carboxylic acid (2\ (b\ methyl butanoate (2\
6.1.4(a\ Marks allocated for: Long chain with 3 carbons and correct umber of hydrogens Correct position of methyl and functional group (b\ methyl
6.2.1
6.2.2The vapour pressure decreases when the chain length (of the alcohol\ increases The vapour pressure increases when the chain length (of the alcohol\ decreases When the chain length (of the alcohol\ increases
6.2.3The intermolecular forces are London forces/ an der Waals forces and ydrogen onding The strength of the London forces/Van der Waals forces increase when the chain length increases More energy is required to break the strong intermolecular
6.3.1ehydration (1\
6.3.2Marks allocated for: Long chain with 4 carbons and correct umber of hydrogens
6.3.3oncentrated strong base oncentrated NaOH [25]25
Q7— Section header —
7.1.190 (cm (1\
7.1.2POSITIVE MARKING FROM Q7.1 TO Q7.2 OPTION 1 =3, =2, OPTION 2
7.1.3POSITIVE MARKING FROM Q7.2.1 TO Q7.2.2 OPTION 1 2(3, 0,2 OPTION 2 3, =(0 \(0,2\
7.2(1\
7.3A catalyst lowers/reduces the activation energy. A catalyst provides an alternate pathway for the reaction The number of effective collisions per second increases [13]13
Q8— Section header —
8.1.1Blue (1\
8.1.2According to Le Chatelier principle some of the added chloride ions must be used up. The forward reaction is favoured/The equilibrium shifts to the right The concentration of CoC 2-
8.2.1OPTION 1 ,8 = 2,4 S : H Mole ratio 3 : 2 2,4 :
8.2.2POSITIVE MARKING FROM Q8.2.1 TO Q8.2.2 OPTION 1 Ratio mol 3,6 2,8 mol 1,6 0,8
8.2.3ncrease (1\
8.3.1Contact (process\
8.3.2mmonia
8.3.317
Q9— Section header —
9.1.1
9.1.2The chemical reaction is exothermic in a alvanic cell and endothermic in an electrolytic cell The anode is negative in a alvanic cell and positive in an electrolytic cell. An emf/current is produced in a
9.1.3
9.1.4(a\ ncrease (1\ (b\ ecrease (1\
9.1.5(aq\ 2e Cu(s\ Reactants Products (2\
9.1.62Cr(s\ 3Cu (aq\ 2Cr (aq\ + 3Cu(s\ Reactants
9.2.1(1\
9.2.2Cu(s\ (aq\ + 2e Reactants Products (2\
9.2.3The impure copper electrode must be replaced with a silver electrode The electrolyte must be replaced with a soluble silver salt , e.g
Q10— Section header —
10.1.1(nitric acid\ and Q (sodium hydrogen carbonate\ (2\
10.1.2T (potassium hydroxide\ (1\
10.2.1trong electrolyte (1\
10.2.2It ionises completely o produce a high concentration of ions\ (2\
10.2.3A base is a proton acceptor (2\
10.2.4= (0,8\(0,2\ POSITIVE MARKING FROM Q10.2.4 TO Q10.2.5
10.2.5(2\ POSITIVE MARKING FROM Q10.2.4 and Q10.2.5 TO Q10.2.6
10.2.6=1,6 0, 0,8 (5\ [18]18
Q11— Section header —
11.1.1Isotopes (1\
11.1.2They have different numbers of neutrons and different atomic mass numbers (2\
11.2.3
11.3.1
11.3.2The beta rays will be blocked from reaching the detector An electric circuit will be closed/ triggered An electric signal will be sent to close the hopper and then move [12] TOTAL SECTION B:12
Topics Identified
6
MechanicsElectricityChemical BondingOrganic ChemistryElectrochemistryThermodynamics
Mark Allocation
Sections5 + 5 + 10 + 15 + 10 + 25 + 13 + 17 + 20 + 18 + 12 = 150 marks
Paper information
TitleMemo
SubjectPhysical Science
LevelNCV Level 4
Document typeQuestion paper
Year2022
MonthNovember
Pages10
Downloads4
Examination context
Decade2020s
Years ago4y
SeasonSpring (SH)
Start dayTuesday
Exam periodNovember 2022
Days since exam1,441
About Physical Science examination preparation
This TVET examination resource can be used as part of a structured revision programme. Past papers are most useful when learners attempt questions independently, work within a realistic time limit, and review their answers afterwards.
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A practical revision approach
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