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2396

When concentrated \(H_2SO_4\) is added to NaCI (s), the gas evolved

  • A. bleaches damp blue litmus paper
  • B. forms a white preciptate with AgNO3(aq)
  • C. forms a white precipitate with BaCI2(aq)
  • D. turns moist red litmus paper blue
View Answer & Discuss (11) WAEC 2008
2397
The collision theory proposes that
  • A. reactants collide more frequently to bring about reduction in the reaction rate
  • B. all collisions of reactants are effective
  • C. reactants must collide with a certain minimum amount of energy to from products
  • D. the fewer the collisions the faster the reaction rate
View Answer & Discuss WAEC 2008
2398

Diamond does not conduct electricity because it?

  • A. has no free valence electrons
  • B. is a giant molecule
  • C. contains no bonded electrons
  • D. is a solid at room temperature
View Answer & Discuss (1) WAEC 2008
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2399
Which of the following set of equations could be used to represent the standard enthalpy of formation of glucose?
  • A. 6C (s) + 6H 2(g) + 3O2(g) → C 6H12O6(s)
  • B. 6CO2(g) + 6H2O (l) → C6H12O6(s) + 6O 2(g)
  • C. 6C(g) + 6H 2(g) + 3O2(g) → C6H12O 6(s)
  • D. 6C(g) + 6H 2(g) + 3O2(g) → C 6H 12O 6(aq)
View Answer & Discuss (1) WAEC 2008
2400
The colour of phenolphthalein indicator in dilute HNO is
  • A. colourless
  • B. orange
  • C. pink
  • D. purple
View Answer & Discuss WAEC 2008
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