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Chemistry Grade 10 Unit 5: Metals and Nonmetals

national exam questions have come from this unit. It runs 36 pages; one careful study pass takes about 4.5 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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5.1 Introduction · read p. 199
Not asked in a national paper yet.
5.2 General Properties of Metals and Production of Some Metals · read p. 200
  • 2018 E.C., Q41 – In the extraction of Iron using a blast furnace, what is the primary purpose of adding Limestone (CaCO₃) to the furnace?
  • 2018 E.C., Q73 – Which of the following sample routine correctly indicates the extraction of copper from its principal ore?
  • 2017 E.C., Q20 – What is the purpose of the conversion of pig iron to steel?
  • 2016 E.C., Q26 – Consider the following five-steps during the extraction of aluminum from its bauxite ore by the Hall process: I. Treating the mixture of an aqueous solution of sodium silicate and aluminate with an acid II. Heating alumi
  • 2015 E.C., Q68 – During the extraction of an unknown metal, the metallic ore was fused with NaOH in air and then dissolved in water to obtain the soluble unknown metal containing species. Reduction with carbon is followed after the solut
  • 2014 E.C., Q52 – Which of the following statements is NOT correct about minerals and ores?
  • 2014 E.C., Q13 – What is the purpose of synthetic cryolite in the extraction of aluminum by the Hall's process?
  • 2014 E.C., Q54 – Which of the following is NOT a major step in metallurgical processes?
  • 2012 E.C., Q66 – The froth-flotation process in metallurgy involves which of the following?
  • 2011 E.C., Q7 – The metal extracted from limestone, chalk and marble is___________.
  • 2011 E.C., Q6 – Which substance is used to lower the melting point of aluminum oxide ore in the electrolytic extraction of aluminum?
  • 2010 E.C., Q8 – Which one of the following metals exists in a free state?
  • 2008 E.C., Q22 – What is the most common Ore used for the extraction of copper?
  • 2007 E.C., Q17 – The most abundant metal on the surface of the earth is
  • 2006 E.C., Q19 – Which of the following metals forms a volatile compound during the extraction process?
  • 2006 E.C., Q73 – Which of the following is the most important source for the extraction of iron?
  • 2005 E.C., Q43 – Which of the following metal alloys does NOT contain tin?
  • 2005 E.C., Q12 – Which of the following metals is NOT obtained by commercial electrolytic process?
  • 2005 E.C., Q15 – Which of the following elements is the second most abundant element in the earth's crust?
5.3 Production of Some Important Nonmetals · read p. 218
  • 2018 E.C., Q5 – Aluminum reacts with a certain nonmetallic element, X to form a compound with the general formula AlX. Element X is a diatomic gas at room temperature. Element X must be
  • 2015 E.C., Q26 – What will be the product if phosphorus reacts with excess amount of oxygen?
  • 2013 E.C., Q7 – The conversion of nitrogen gas into useful nitrogen compounds is known as