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Q1— Section header —
1.5\ in the ANSWER BOOK.
1.1Personal protective clothes are used to safeguard the safety of workers against health and safety threats.
1.2Scaling in industrial pipes results from water that has a lower pH.
1.3Chemicals that are used to process living things are called agro chemicals.
1.4The South African onstitution sets guidelines for matters that affect the environment.
1.55
Q2— Section header —
2.1Petrochemicals are chemicals that are formed after prrocessing petroleum or crude oil.
2.1.1Which South African company was formed in 1950 to produce petroleum from coal? (1\
2.1.2Briefly explain why the company in
Q2— Section header —
2.1.3List THREE examples of substances that are derived from crude oil. (3\
2.1.4Explain the difference between coal and crude oil. (2\
2.2Coal is a non renewable natural resource that is formed after millions of years.
2.2.1What is a non renewable natural resource? (1\
2.2.2Name the South African utility company that uses coal to generate electrical energy. (1\
2.2.3List FOUR elements that are the main components of coal. (4\
2.2.4State FOUR industrial applications of coal. (4\ [19] 07>FLRVZ^`bcdeeeffffffffeedcb`^[WRMF?80 07>FLQVZ]`bcddeefffffffffffffffffffffeeedcb`^ZVRLF?80 08?FLRW[^`bcdeeefffffffffffffffffffffffffeeedcb`^[WRMF?8019
Q3— Section header —
3.1Define the following terms:
3.1.1Turbidity
3.1.2Scaling (2 2\ (4\
3.2Briefly discuss the polluters must pay principle (3\
3.3Mention FIVE steps in sequence of a typical waste water treatment. (5\
3.4Draw a labelled diagram of an activated sludge digester. (7\
3.5Briefly discuss flash mixing in water purification process. (3\
3.6List SIX substances that are used as disinfectants. (6\ [28]28
Q4— Section header —
4.1The main components of air are nitrogen and oxygen.
4.1.1What is the % of oxygen in air? (1\
4.1.2List FOUR physical properties of oxygen. (4\
4.1.3What is the % of nitrogen in air? (1\
4.1.4Name FOUR other gases (except oxygen and nitrogen\that are also found in air. (4\
4.1.5List FIVE industrial applications of nitrogen. (5\ /6<BHLPTWYZ\]]\ZYWTQMHB=60 /7>EKQVZ]_abcddddddcba`]ZVRLF@81 07?FLRVZ^`bcdeeeffffffffffffeeeddba^\XSNHA:2+$ $+2:AHNSX\^abddeeefffffffffffffeeddca_]YUPJD=5.& &.5=DJPUY]_acddeeffffffffffffffeeedcb`^ZWRLF?81
4.2The following equation is used for the industrial preparation of acetylene from calcium carbide: CaC \ + H O (
Q5— Section header —
5.1Choose a word or a term from the brackets to ma tch a description given below. Write only the word or term nex t to the question number (5.1.1
5.1.5in the ANSWER BOOK. sodium sulphate; cullet; silica; feldspar; sodium carbonate
5.1.1The main source of this compound is quartz sand and sandstones.
5.1.2Used as a refining agent that helps to eliminate bubbles in glass.
5.1.3Used as a fluxing agent during glass production process.
5.1.4Recycled glass that is added to the raw materials.
5.1.5Also known as soda ash. (5 1\ (5\ /6<BHLPTWYZ\]]\ZYWTQMHB=60 /7>EKQVZ]_abcddddddcba`]ZVRLF@81 07?FLRVZ^`bcdeeeffffffffffffeeeddba^\XSNHA:2+$
5.2ame TWO properties of commercial glass. (2\
5.3Draw a labelled flow diagram of glass production process. (12\ [19]19
Q6— Section header —
6.1Indicate what the following personal protective equipment s are used for:
6.1.1Respirator
6.1.2Hardhat
6.1.3Ear plugs
6.1.4Face shield
6.1.5Overalls (5 1\ (5\
6.2Write a short description of an eye wash station. (4\ [9] TOTAL: 1009