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Chemistry Past Questions

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4581

From the graph, it can be inferred that

  • A. the solubility of X and Y is the same at all temperature
  • B. the solubility of X, Y and Z is temperature dependent
  • C. solubility of Z increases as temperature increases
  • D. solubility of Y increases steadily as temperature increases
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4582

The gas that is commonly used to demonstrate the fountain experiment is

  • A. hydrogen chloride
  • B. hydrogen sulphide
  • C. dinitrogen(I) oxide
  • D. nitrogen(II) oxide
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4583

Which of the following statements is false about hard water?

  • A. Helps animals to build strong teeth
  • B. Cannot be supplied in pipes made of leads
  • C. Tastes better than soft water
  • D. Helps animals to build strong bones.
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4584

The empirical mass of C\(_6\)H\(_{12}\)O\(_6\) is 

[H =1, C = 12, O = 16]

  • A. 90
  • B. 180
  • C. 45
  • D. 30
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4585

The nitrogenous compound in dead materials in the soil is converted to 

  • A. ammonia
  • B. trioxonitrate(V)
  • C. ammonium salts
  • D. dioxonitrate(III)
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