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16

Using the metal activity series, the metal that can liberate hydrogen gas from steam is?

  • A. iron
  • B. copper
  • C. tin
  • D. lead
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17

Zn + 2HCL → ZnCl\(_2\) + H\(_2\) 

What happens to zinc in the above reaction?

  • A. oxidized
  • B. a reactant
  • C. reduced
  • D. a metal
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18

Wrought iron is obtained by heating cast iron in a furnace with?

  • A. magnetite
  • B. haematite
  • C. carbon(ii)oxide
  • D. calcium trioxosilicate(iv)
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19

In the extraction of iron, hot air is introduced into the blast furnace through?

  • A. valves
  • B. open-hearths
  • C. arcs
  • D. tuyeres
View Answer & Discuss (1) JAMB 2022
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts