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Chemistry JAMB Past Questions

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1991

What technique is suitable for separating a binary solution of potassium chloride and potassium trioxochlorate (V)?

  • A. Fractional crystallization
  • B. Fractional distillation
  • C. Filtration
  • D. Evaporation
View Answer & Discuss (3) JAMB 2019
1992

At 27°C, 58.5g of sodium chloride is present in 250cm\(^3\) of a solution. The solubility of sodium chloride at this temperature is?
(molar mass of sodium chloride = 111.0gmol\(^{-1}\))

  • A. 2.0 moldm\(^{-3}\)
  • B. 0.25 moldm\(^{-3}\)
  • C. 1.0 moldm\(^{-3}\)
  • D. 0.5 moldm\(^{-3}\)
View Answer & Discuss JAMB 2019
1993

Which of the following properties increases from left to right along the period but decreases down the group in the Periodic Table?
i. Atomic Number   ii. Ionization energy  iii. Metallic character  iv. Electron affinity

  • A. ii and iii only
  • B. ii and iv only
  • C. iii and iv only
  • D. i and ii only
View Answer & Discuss JAMB 2019
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1994

The molecular shape and bond angle of water are respectively

  • A. linear, 180°
  • B. bent, 109.5°
  • C. tetrahedral, 109.5°
  • D. bent, 105°
View Answer & Discuss (2) JAMB 2019
1995

Na\(_2\)CO\(_3\) + 2HCl \(\to\) 2NaCl + H\(_2\)O + CO\(_2\)

The indicator most suitable for this reaction should have a pH equal to

  • A. 5
  • B. 7
  • C. 3
  • D. 9
View Answer & Discuss (8) JAMB 2019
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