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Chemistry Past Questions

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1611
Use the graph above to answer this question. A sample, X, solid at room temperature, was melted, heated to a temperature of 358 K and allowed to cool as shown in OPQR. The section PQ indicates that X is
  • A. a mixture of salts
  • B. a hydrated salt
  • C. an ionic salt
  • D. a pure compound
View Answer & Discuss (5) JAMB 1997
1612
Use the graph above to answer this question. A sample, X, solid at room temperature, was melted, heated to a temperature of 358 K and allowed to cool as shown in OPQR.The section OP suggests that X is in the
  • A. liquid sate
  • B. solid/liquid state
  • C. solid state
  • D. gaseous state
View Answer & Discuss (8) JAMB 1997
1613

In the diagram above the gas Y could be

  • A. hydrogen chloride
  • B. oxygen
  • C. carbon (IV) oxide
  • D. chlorine
View Answer & Discuss (7) JAMB 1997
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1614

The IUPAC nomenclature of the organic compound with the above structural formula is

  • A. 3-ethyl-2,5-dimethylhexane
  • B. 4-ethyl-2,5-dimethylhexane
  • C. 3-ethyl-2,5,5 - trimethylpentane
  • D. 3-ethyl, 1,1,4-trimethylpentane
View Answer & Discuss (28) JAMB 1997
1615
How many more isomers of the compound above can be obtained ?
  • A. 5
  • B. 4
  • C. 3
  • D. 2
View Answer & Discuss (5) JAMB 1997
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