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Chemistry Past Questions

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3826

which of the following pairs of substances has the highest heat of neutralization?

  • A. strong acid and strong base
  • B. weak acid and weak base
  • C. strong acid and weak base
  • D. weak acid and strong base
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3827

When quicklime dissolves in water?

  • A. heat is absorbed
  • B. heat is evolved
  • C. oxygen is liberated
  • D. hydrogen is given off
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3828

If the value of ΔH is positive for a reaction, it means that the reaction is?

  • A. exothermic
  • B. endothermic
  • C. spontaneous
  • D. slow
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3829

Which of the following compounds is formed by the oxidation of ethanol?

  • A. C\(_2\)H\(_4\)CO\(_2\)H
  • B. C\(_2\)H\(_5\)CO\(_2\)H
  • C. CH\(_3\)OH
  • D. CH\(_3\)CO\(_2\)H
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3830

What is the characteristic of the gas liberated when dilute hydrochloric acid is added to Iron(ii)sulphide?

  • A. turns lime water milky
  • B. decolorizes bromine water
  • C. gives a pop sound
  • D. turns lead(ii)ethanoate paper black
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