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Chemistry JAMB Past Questions

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
1896

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
1897

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
1898

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
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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1899

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
1900

The number of electrons in the valence shell of an element of atomic number 14 is?

  • A. 1
  • B. 2
  • C. 3
  • D. 4
View Answer & Discuss (7) JAMB 2018
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