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Chemistry 2001 NECO Past Questions

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6

The use of sulphur to vulcanize rubber is made to make it

  • A. blacker.
  • B. cheaper. .
  • C. more elastic
  • D. tougher
  • E. softer.
View Answer & Discuss (4) NECO 2001
7

Which element contains the greatest number of moles?

  • A. 8 g of Helium
  • B. 48 g of Carbon
  • C. 78 g of Potassium
  • D. 130g of Zinc
  • E. 216g of Sliver
View Answer & Discuss (12) NECO 2001
8

The position of an element in the Periodic Table is determined by?

  • A. its atomic radius.
  • B. its density.
  • C. its relative atomic mass.
  • D. the number of protons in its atom.
  • E. the number of neutrons in its atoms
View Answer & Discuss (8) NECO 2001
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9
what dose the following equation illustrate? \( ^{238}U_{92} → ^{234}Th_{90} + ^4 He_2 \)
  • A. Artificial radioactivity
  • B. nuclear fission
  • C. nuclear fusion
  • D. radio-decomposition
  • E. spontaneous disintegration
View Answer & Discuss (9) NECO 2001
10
Which compound can be used as a reducing agent in a reaction?
  • A. Cl2
  • B. KMnO4
  • C. KCr2O7
  • D. MnO2
  • E. Na2SO3
View Answer & Discuss (4) NECO 2001
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