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Chemistry Past Questions

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4096

Protons and electrons are called fundamental particles because they----------

  • A. are indivisible
  • B. have different charges
  • C. are the lightest particles
  • D. are found in all matter
View Answer & Discuss (6) WAEC 2021

Consider the following energy profile diagram and use it to answer the question that follows

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4097

The activation energy of the reaction is

  • A. E\(_{A}\)
  • B. E\(_{B}\)
  • C. E\(_{C}\)
  • D. E\(_{D}\)
View Answer & Discuss (4) WAEC 2021
4098

The enthalpy change of the reaction is------------

  • A. E\(_{A}\)
  • B. E\(_{B}\)
  • C. E\(_{C}\)
  • D. E\(_{D}\)
View Answer & Discuss (2) WAEC 2021
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4099

The energy profile diagram illustrates-------------

  • A. an endothermic reaction
  • B. an exothermic reaction
  • C. a spontaneous reaction
  • D. a redox reaction
View Answer & Discuss (1) WAEC 2021
4100

How many molecules of oxygen would occupy a volume of 2.24 cm\(^{3}\) at s.t.p?

[Molar volume at s.t.p = 22,400 cm\(^{3}\), Avogadro's number = 6.02 x 10\(^{23}\)]

  • A. 3.01 x 10\(^{20}\)
  • B. 3.01 x 10\(^{27}\)
  • C. 6.02 x 10\(^{19}\)
  • D. 6.02 x 10\(^{27}\)
View Answer & Discuss (3) WAEC 2021
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