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Chemistry Past Questions

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376

The characteristic colour of the flame shown when a copper salt moistened with concentrated hydrochloric acid on a platinum wire is put on bunsen burner is

  • A. lilac
  • B. green
  • C. yellow
  • D. brick-red
View Answer & Discuss (4) JAMB 2006
377

In the industrial production of H2 from natural gas the CO2 produced along with the H2 is removed by

  • A. washing under pressure
  • B. drying over phosphorus (V) oxide
  • C. passing the mixture into lime water
  • D. using ammonical copper (I) chloride
View Answer & Discuss (14) JAMB 2006
378

The sulphide which is insoluble in dilute hydrochloric acid is

  • A. FeS
  • B. CuS
  • C. ZnS
  • D. Na2S
View Answer & Discuss (8) JAMB 2006
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379

Which of the following typically represents a photochemical reaction?

  • A. Formation of water from hydrogen and oxygen molecules
  • B. Conversion of dinitrogen (IV) oxide to nitrogen (IV) oxide
  • C. Decomposition of calcium hydroxide to its oxide
  • D. Conversion of silver halides to grey metallic silver
View Answer & Discuss (4) JAMB 2006
380

The gas obtained as a product of anaerobic action on organic matter buried in the earth is?

  • A. ethene
  • B. methane
  • C. carbon (IV) oxide
  • D. nitrogen (IV) oxide
View Answer & Discuss (18) JAMB 2006
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