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356
What volume of oxygen at s.t.p would react with carbon to form 4.40g of CO2 according to the following equation? C(s) + O2(g) → CO2(g) [O = 16; C =12; 1 mole of a gas occupies 22.4dm3 at s.t.p]
  • A. 0.224dm3
  • B. 2.24dm3
  • C. 4.40dm3
  • D. 4.48dm3
  • E. 22.4dm3
View Answer & Discuss (2) WAEC 1997
357
A mixture of NaCI(s) and CaCO3(s) is best separated by
  • A. dissolution followed by filtration
  • B. sublimation followed by crystallization
  • C. dissolution followed by evaporation
  • D. dissolution followed by crystallization
  • E. sublimation followed by dissolution
View Answer & Discuss (1) WAEC 1997
358
What is the basicity of the acid in the followed reaction? NaCO + 2CHCOOH → 2CH COONa + H2O + CO2
  • A. 1
  • B. 2
  • C. 3
  • D. 4
  • E. 8
View Answer & Discuss (1) WAEC 1997
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359
AN AQUEOUS SOLUTION IS ACIDIC IF
  • A. its pH value is high
  • B. it s corrosive
  • C. it changes the colour of litmus
  • D. it has a bitter taste
  • E. it contains more H3O- than OH-
View Answer & Discuss WAEC 1998
360
The following oxides react with water except
  • A. Na2O
  • B. SO3
  • C. NO2
  • D. CO2
  • E. CuO
View Answer & Discuss (4) WAEC 1998
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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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