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Chemistry 2009 NECO Past Questions

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6

The percentage composition of a hydrocarbon is 79.2 carbon 20.8 hydrogen. Calculate its empirical formula [H = 1, C = 12]

  • A. CH
  • B. CH3
  • C. CH4
  • D. C2H2
  • E. C2H6
View Answer & Discuss (1) NECO 2009
7

The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT

  • A. HOCH2 – CH2OH
  • B. H2C –C =C– CH3
  • C. H3C – HC = CH2
  • D. H2C = CH2
  • E. H3C – C =CH
View Answer & Discuss (6) NECO 2009
8
The scientist who discovered the zig-zag movement of gas molecules is
  • A. Brownian
  • B. Dalton
  • C. Gay Lussac
  • D. Graham
  • E. Newton
View Answer & Discuss NECO 2009
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9
Which of the following is NOT a fraction of petroleum?
  • A. Bitumen
  • B. Coal
  • C. Diesel
  • D. Kerosene
  • E. Petrol
View Answer & Discuss NECO 2009
10
Which of the following statements is NOT correct of group VII elements? They
  • A. are diatomic
  • B. are good oxidizing agents
  • C. are highly electronegative
  • D. have high electron affinity
  • E. have relatively low ionization potentials
View Answer & Discuss (2) NECO 2009
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