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Chemistry 2018 JAMB Past Questions

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21

Which of the following pairs of substances will react further with oxygen to form a higher oxide?

  • A. CO\(_2\) and H\(_2\)O
  • B. NO and H\(_2\)O
  • C. CO and CO\(_2\)
  • D. SO\(_2\) and NO
View Answer & Discuss (7) JAMB 2018
22

In the preparation of oxygen by heating KCIO\(_3\) , in the presence of MnO\(_2\) only moderate heat is needed because the catalyst acts by \(_2\)

  • A. lowering the pressure of the reaction
  • B. increasing the surface area of the reaction
  • C. increasing the rate of the reaction
  • D. increasing the energy barrier of the reaction
View Answer & Discuss (7) JAMB 2018
23

Methanoic acid mixes with water in all proportions and has about the same boiling point as water. Which of the following methods would you adopt to obtain pure water from a mixture of Sand, water and methanoic acid?

  • A. Extractive distillation
  • B. Filtration followed by distillation
  • C. Neutralization with sodium hydroxide followed by distillation
  • D. Neutralization with sodium hydroxide followed by filtration
View Answer & Discuss (33) JAMB 2018
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24

A quantity of electricity liberates 3.6g of Silver from its salt. What mass of aluminium Will be liberated from its salt by the same quantity of electricity? [Al = 27, Ag = 108].

  • A. 2.7g
  • B. 1.2g
  • C. 0.9g
  • D. 0.3g
View Answer & Discuss (23) JAMB 2018
25

Suitable reagents for the laboratory preparation of nitrogen are

  • A. sodium dioxonitrate(III) and ammonium chloride
  • B. sodium trioxonitrate(V) and ammonium chloride
  • C. sodium chloride and ammonium trioxonitrate(V)
  • D. sodium chloride and ammonium di-ozonitrate(III)
View Answer & Discuss (7) JAMB 2018
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