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Chemistry 1999 JAMB Past Questions

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26
RS(aq) + HF(aq) → RF(s) + HS(aq)
ΔH = -65.7 kj mol(-1).
From the equation above, it can be deduced that
  • A. the heat content of the reactants is lower than that of the products
  • B. the heat content of the reactants is higher than that of the products
  • C. the reaction is slow
  • D. a large amount of heat is absorbed
View Answer & Discuss (6) JAMB 1999
27
Which of the following statement is true of the electrochemical series?
  • A. Electropositivity of metals increase down the series
  • B. Electropositivity of non-metals decrease down the series
  • C. Electronegativity of non-metals decrease down the series
  • D. Electropositivity of metals decreases down the series
View Answer & Discuss (11) JAMB 1999
28
The gas that will form a white precipitate with acidified silver trioxonitrate (v) is
  • A. NH3
  • B. SO2
  • C. CO2
  • D. HCL
View Answer & Discuss (10) JAMB 1999
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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29

Chlorine, bromine and iodine resemble one another in that they?

  • A. dissolve in alkalis
  • B. react violently with hydorgen without heating
  • C. are liquids
  • D. displace one another from solutiions of their salts
View Answer & Discuss (26) JAMB 1999
30
The salt that reacts with dilute hydrochloric acid to produce a pungent smelling gas which decolourizes acidified purple potassium tetraoxomanganate (VII) solution is
  • A. Na2SO4
  • B. Na2SO3
  • C. Na2S
  • D. Na2CO3
View Answer & Discuss (13) JAMB 1999
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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