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Chemistry Past Questions

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3236

The boiling of fat and aqueous caustic soda is referred to as

  • A. hydrolysis
  • B. esterification
  • C. acidification
  • D. saponification
View Answer & Discuss (2) JAMB 2018
3237

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
3238

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 (4) JAMB 2018
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
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3239

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 (19) JAMB 2018
3240

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 (17) 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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Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
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