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Chemistry Past Questions

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1

In titration involving sodium hydroxide and dilute hydrochloric acid, where would you place the base?

  • A. in the beaker
  • B. in the conical flask
  • C. in a burette
  • D. in the standard flask
  • E. in the measuring cylinder
View Answer & Discuss (24) JAMB 1978
2

What volume of gas is evolved at S.t.p if 2g of calcium trioxocarbonate (IV) is added to a solution of hydrochloric acid?
[Ca = 40, C = 12, O = 16, Cl = 35.5, H = 1 Molar volume of a gas at s.t.p = 22.4 dm\(^3\)

  • A. 112 cm3
  • B. 224 cm3
  • C. 448 cm3
  • D. 2240 cm3
View Answer & Discuss (13) JAMB 2004
3

The percentage of water of crystallization in ZnSO\(_4\).7H\(_2\)O is?
[Zn = 65, S = 32, O = 16, H = 1]

  • A. 33%
  • B. 44%
  • C. 55%
  • D. 87%
View Answer & Discuss (15) JAMB 2009
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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4

Calculate the volume of 0.5 mol dm\(^{-3}\) H\(_2\)SO\(_4\) that is neutralized by 25 cm\(^3\) of 0.1 mol dm\(^3\) NaOH?

  • A. 5.0 cm3
  • B. 2.5 cm3
  • C. 0.4 cm3
  • D. 0.1 cm3
View Answer & Discuss (24) JAMB 2010
5

To a solution of an unknown compound, a little dilute tetraoxosulphate (VI) acid was added with some freshly prepared iron (II) tetraoxosulphate (VI) solution. The brown ring observed after the addition of a stream of concentrated tetraoxosulphate (VI) acid confirmed the presence of?

  • A. CO\(^{2-}_{3}\)
  • B. Cl-
  • C. SO\(_{3}^{2-}\)
  • D. NO\(^{2-}_{3}\)
View Answer & Discuss (6) JAMB 2010
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