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Chemistry 2019 JAMB Past Questions

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11

Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium?

  • A. Zinc
  • B. Manganese
  • C. Sodium
  • D. Iron
View Answer & Discuss (1) JAMB 2019
12

Which of the following alkaline earth metals react more spontaneously with water?

  • A. Calcium
  • B. Beryllium
  • C. Magnesium
  • D. Strontium
View Answer & Discuss (5) JAMB 2019
13

When chlorine water is exposed to bright sunlight, the following products are formed

  • A. HCl\(_{(aq)}\) and Cl\(_2\)
  • B. HOCl\(_{(aq)}\) and Cl\(_2\)
  • C. HCl\(_{(aq)}\) and O\(_2\)
  • D. HOCl\(_{(aq)}\) and O\(_2\)
View Answer & Discuss (2) JAMB 2019
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
14

Which process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas?

  • A. chlorine attacks the starch to give the blue-black color
  • B. chlorine attacks the iodide ion to give the blue-black color
  • C. chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color
  • D. iodine attacks the starch to give the blue-black color
View Answer & Discuss (4) JAMB 2019
15

Which of the following is a set of neutral oxides?

  • A. N\(_2\)O, H\(_2\)O, CO
  • B. N\(_2\)O, SO\(_2\), CO
  • C. N\(_2\)O, Na\(_2\)O, ZnO
  • D. N\(_2\)O, SO\(_3\), NO
View Answer & Discuss (5) JAMB 2019
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts