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221

The postulate of Dalton's atomic theory which still holds is that

  • A. atoms can neither be created nor destroyed
  • B. the particles of the same element are exactly alike
  • C. particles of different elements combine in simple whole number ratio
  • D. all elemets are made of small indivisible particles
View Answer & Discuss (43) JAMB 2002
222

\(^{14}\) \(_6\)C → X + β
X in the equation above represents

  • A. 126C
  • B. 125B
  • C. 147N
  • D. 136C
View Answer & Discuss (9) JAMB 2002
223

If 0.75 mole of cyclopropane and 0.66 mole of oxygen are mixed in vessel with a total pressure of 0.7 atmosphere, what is the partial pressure of oxygen in the mixture

  • A. 0.44 atmosphere
  • B. 0.22 atmosphere
  • C. 0.55 atmosphere
  • D. 0.33 atmosphere
View Answer & Discuss (13) JAMB 2002
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224
What volume of oxygen is produced from the decomposition of 2 mole of KCIO3 at s.t.p?
[Molar volume of a gas at s.t.p = 22.4 dm3]
  • A. 22.4 dm3
  • B. 33.6 dm3
  • C. 44.8 dm3
  • D. 67.2 dm3
View Answer & Discuss (14) JAMB 2003
225

Which of the following is physical change?

  • A. Burning kerosene
  • B. Freezing ice cream
  • C. Exposing white phosphorus
  • D. Dissolving calcium in water
View Answer & Discuss (6) JAMB 2003
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