Process Chemistry NCV Level 4 — Memo

November 2023 — NCV Level 4 — Process Chemistry

NCV Level 4 2023 NCV Engineering

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Q1— Section header —

1.1

Q2— Section header —

2.1Catalytic cracking

2.2Mining

2.3Penicillin

2.4Gold

2.5

Q3— Section header —

3.1.1It is tough It is durable Hydrogen Good electrical insulation properties Good corrosion resistance

3.2.12NaCl(aq\ + 2H O(l\ (g\ (g\ 2NaOH(aq\ (5\

3.2.2(g\ (3\ [15]15

Q4— Section header —

4.1.1The re melting process can be repeated indefinitely.

4.1.2Thermosetting or thermo hardening resins undergo a permanent chemical reaction (cross linking \ when they are heated and therefore they cannot be recycled. This process prevent

4.2.2.1 Butadiene rubber Nitrile rubber Silicon rubber .2.2 Latex Fibre Powder [12

Q5— Section header —

5.1Impala platinum or Implats African Rainbow Mineral or ARM Platinum Cu spent Ni(OH\ electrolyte Solution Milled Lead cake mate

Q6— Section header —

6.1.3

6.2The o re concentrate is dissolved in an HCl solution to produce chloro omple uring the dissolution. 98% of platinum, palladium and gold are dissolved 90% of ruthenium, rhodium and iridium are also dissolved.

Q7— Section header —

7.1.1Production of cumene Production of isopropanol Ethyl oxide is use in the pr oduction of detergents and surfa ctants Production of styrene

7.2.1Paraffins, olefin, naphthenes and aromatics

7.2igh temperature Fischer Tropsch

7.3.1Freeze point Flash point

3.2Used as fuel in lamps Also used for domestic heating and cooking Any (2\ [16]16

Q8— Section header —

8.1.1Gas cleaning and recovery Fischer Tropsch synthesis . It is produced by polymerizing Styrene and Butadiene in a ntrolled setting, then adding curatives and fillers like sulfur and carbon black . The resulting material is then cured or vulcanized

Q9— Section header —

9.1.1Adcock Ingram LTD

9.1.2NCP Alcohols

9.1.3

9.2Water Yeast The wort, yeast and air are added to the fermentation vessel. Air provides oxygen to the yeast to start the fermentation process. Once all the sugars are converted to alcohol, the process stops.

Topics Identified

ElectricityChemical BondingOrganic ChemistryElectrochemistryThermodynamics

Mark Allocation

Sections15 + 13 + 16 = 44 marks

Paper information

TitleMemo

SubjectProcess Chemistry

LevelNCV Level 4

Document typeNCV Engineering

Year2023

MonthNovember

Pages6

Downloads3

Examination context

Decade2020s

Years ago3y

SeasonSpring (SH)

Start dayWednesday

Exam periodNovember 2023

Days since exam1,075

About Process Chemistry 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.

How to use this resource for revision

A TVET past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

applying subject knowledge

working under time constraints

checking answers

identifying revision priorities

A practical revision approach

Start by completing the resource without looking at the memorandum. Review incorrect and incomplete answers afterwards and make a short revision list based on the areas that caused difficulty.

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File size206.7 KB

Pages6

Archived on8 September 2026

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