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Chemistry Grade 12 Unit 3: INDUSTRIAL CHEMISTRY

26 national exam questions have come from this unit. It runs 79 pages; one careful study pass takes about 7.2 hours, and its difficulty is moderate among Chemistry units. Each section below lists the questions set from it, with the year, and opens the page that teaches it.

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3.2 Natural Resources and Industry · read p. 135
  • 2015 E.C., Q25 – Which of the following statements describes chemical industries? It is
3.1 Introduction · read p. 136
Not asked in a national paper yet.
3.2.1 Natural Resources (Raw Materials) · read p. 139
Not asked in a national paper yet.
3.2.2 Industry · read p. 140
  • 2018 E.C., Q61 – Which of the following describes the process of manufacturing valuable products in industries?
  • 2017 E.C., Q32 – Which of the following describes the process of manufacturing valuable products in industries?
3.3 Manufacturing of Valuable Products/ Chemicals · read p. 143
Not asked in a national paper yet.
3.3.1 Ammonia (NH3) · read p. 143
  • 2016 E.C., Q9 – Consider the following three steps: Step 1 : Electrolysis of water and fractional distillation of air Step 2 : Passing hot mixture of gases through a condenser Step 3 : Introducing hydrogen and nitrogen gases in a chambe
3.3.2 Nitric Acid · read p. 152
  • 2017 E.C., Q4 – Which of the following catalyst is used in the Ostwald process for the production of $HNO_3$?
  • 2016 E.C., Q10 – Which of the following is a physical property of nitric acid, HNO 3 ?
  • 2015 E.C., Q48 – Which one of the following reaction represents formation of an acid from its salt?
  • 2005 E.C., Q70 – How many mL conc. $\mathrm{HNO_3}$ and how many mL of water are required to prepare 500mL of 0.1M $\mathrm{HNO_3}$ from a conc. 13M $\mathrm{HNO_3}$?
3.3.3 Nitrogen-Based Fertilizers · read p. 158
  • 2018 E.C., Q60 – Which one of the following fertilizers supplies the highest percentage of nitrogen to plants?
  • 2007 E.C., Q8 – The conversion of nitrogen gas to nitrates by bacteria is called
  • 2005 E.C., Q50 – Which of the following is the most important ingredients used for production of DAP fertilizer?
3.3.4 Sulphuric Acid · read p. 162
  • 2018 E.C., Q59 – At which stage of industrial manufacturing process of sulphuric acid, vanadium (V) oxide specifically required to ensure efficient industrial production?
  • 2011 E.C., Q43 – Which of the following reactions is NOT involved in the contact process, during the production of sulfuric acid?
  • 2009 E.C., Q55 – Which of the following reactions is used in the production of industrially important chemical?
3.3.5 Some Common Pesticides and Herbicides · read p. 165
  • 2018 E.C., Q64 – Which of the following chemicals is mainly used to kill unwanted plants in agricultural fields?
  • 2016 E.C., Q11 – Which of the following is the CORRECT explanation about herbicides?
3.3.6 Sodium Carbonate · read p. 170
  • 2018 E.C., Q63 – Which of the following chemicals is commonly known as washing soda?
3.3.7 Sodium Hydroxide (NaOH) · read p. 172
Not asked in a national paper yet.
3.4 Some Manufacturing Industries in Ethiopia · read p. 174
Not asked in a national paper yet.
3.4.1 Glass Manufacturing · read p. 175
  • 2018 E.C., Q62 – Which type of glass is made by heating a mixture of silica, sodium carbonate and limestone?
  • 2017 E.C., Q1 – Which type of glass is made by heating a mixture of silica, sodium carbonate and limestone?
3.4.2 Manufacturing of Ceramics · read p. 178
Not asked in a national paper yet.
3.4.3 Cement · read p. 180
Not asked in a national paper yet.
3.4.4 Sugar Manufacturing · read p. 183
Not asked in a national paper yet.
3.4.5 Paper and Pulp · read p. 185
Not asked in a national paper yet.
3.4.6 Tannery · read p. 187
Not asked in a national paper yet.
3.4.7 Food Processing and Preservation · read p. 189
  • 2017 E.C., Q61 – Which of the following process involves preventing the growth of bacteria, fungi and reducing the oxidation of fats?
  • 2016 E.C., Q27 – Which of the following food preservation methods leaves a product without loss of aroma or flavor?
3.4.8 Manufacturing of Ethanol · read p. 191
  • 2018 E.C., Q66 – Which of the following shows the correct sequence of steps in the preparation of local alcohol (Araki)?
  • 2016 E.C., Q12 – A student collected the following information from the community on the preparation of the local alcoholic drink "ARAKI": Step 1 : Distillation of the liquid mixture in traditional ways Step 2 : Adding a proportional amo
3.4.9 Soap and Detergent · read p. 198
  • 2017 E.C., Q55 – In order to avoid the decrease in quality of some clothes after washing with water, which of the following chemicals is used for dry cleaning?