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2911
The following gases are diatomic EXCEPT
  • A. Fluorine
  • B. Helium
  • C. Hydrogen
  • D. Nitrogen
  • E. Oxygen
View Answer & Discuss NECO 2008
2912
Which of these is NOT a physical property f water?
  • A. Can be used to dissolve organic substances
  • B. Has a boiling point of 100 ° C
  • C. Has a density of 19cm3 at 40 °C
  • D. Has a freezing point of 0 ° C
  • E. is neutral to litmus
View Answer & Discuss (4) NECO 2008
2913
During the electrolysis of sodium Chloride solution, hydrogen is discharged at the carbon cathode because
  • A. hydrogen ions are in greater concentration than sodium ions.
  • B. hydrogen is higher than sodium in the electrochemical series.
  • C. hydrogen is lower than sodium in the electrochemical series.
  • D. of the nature of the electrodes.
  • E. the concentration of sodium ions is greater than that of the hydrogen ion in the electrolyte.
View Answer & Discuss NECO 2008
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2914
Chromatography is used to separate components of mixtures which differ in their rates of
  • A. diffusion
  • B. migration
  • C. reaction
  • D. sedimentation
  • E. sublimation.
View Answer & Discuss (2) NECO 2008
2915

The electrode potential in volts of 2H\(^+\)(aq) / H\(_2\)(q) system is

  • A. -2.87
  • B. -2.71
  • C. 0.8
  • D. 1.68
  • E. \( 0 \)
View Answer & Discuss (3) NECO 2008
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Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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