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Chemistry 2024 JAMB Past Questions

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101

The general molecular formula C\(_n\)H\(_{2n-2}\) represents that of an

  • A. alkyne
  • B. alkene
  • C. alkane
  • D. alkanal
View Answer & Discuss (2) JAMB 2024
102

What accounts for the low melting and boiling points of covalent molecules?

  • A. They have weak intermolecular forces.
  • B. They are three-dimensional structures.
  • C. They have definite shapes.
  • D. They possess shared electron pairs
View Answer & Discuss (1) JAMB 2024
103

After breathing in a test tube that contains acidified K\(_2\)Cr\(_2\)O\(_7\), a man noticed the change in the colour of K\(_2\)Cr\(_2\)O\(_7\) from orange to green. This suggests the presence of

  • A. alkanone
  • B. alkanal
  • C. alkanol
  • D. alkanoic acid
View Answer & Discuss (4) JAMB 2024
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104

Hydrochloric acid is not suitable in the preparation of ethanoic acid because it

  • A. is too acidic
  • B. is too volatile
  • C. can attack cork and rubber used as containers
  • D. turns blue litmus red
View Answer & Discuss (4) JAMB 2024
105

A radioactive element of mass 1g has half-life of 2 minutes, what fraction of the substance would have disintegrated after 10 minutes?

  • A. 1/4
  • B. 1/8
  • C. 1/16
  • D. 1/32
View Answer & Discuss (5) JAMB 2024
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