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Chemistry 1981 JAMB Past Questions

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46

An efflorescent compound is a substance that?

  • A. absorbs water froom the air without dissolving in it
  • B. is capable of giving off coloured luminosity
  • C. gives out water to the atmosphere
  • D. absorbs water from the air and dissolves in it
  • E. gives out its water of crystallization on heating
View Answer & Discuss (15) JAMB 1981
47
The general formula of an alkyl halide (which represent the halide) is?
  • A. CnH2n - 2X
  • B. CnH2n + 1X
  • C. CnH2n + 2X
  • D. CnH2nX
  • E. CnH2n - 1
View Answer & Discuss (1) JAMB 1981
48
The IUPAC name for
  • A. 1-methlpentane
  • B. 3-methylbutane
  • C. 2-methylbutane
  • D. 1-dimethylpropane
  • E. 2-methylpentane
View Answer & Discuss (10) JAMB 1981
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49
Which of the following represents a precipitation reaction?
  • A. H2SO4 + NaCl \(\to\) NaHSO4 + HCl
  • B. Fe +H2SO4 \(\to\) FeSO4 + H2
  • C. 4HCl + MnO2 \(\to\) MnCl2 + 2H2O + Cl2
  • D. Na2SO4 + pb(NO3) \(\to\) PbSO4 + 2NaNO
  • E. CuO +2HCl \(\to\) Cl2 + H2O
View Answer & Discuss (3) JAMB 1981
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