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1171

2.25g of a sample of an oxide of copper on reduction gave 2.0g of copper. 2.50g of another oxide of copper on reduction also gave 2.0g of copper. These results are in accordance with the law of?

  • A. constant composition
  • B. conservation of matter
  • C. multiple proportions
  • D. definite proportions
View Answer & Discuss (18) JAMB 1988
1172
One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at s.t.p?

(G.M.V = 22.4 dm3 mol-1)
  • A. 112.0 dm3
  • B. 67.2 dm3
  • C. 56.0 dm3
  • D. 44.8 dm3
View Answer & Discuss (8) JAMB 1988
1173

An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?

  • A. average velocity of the molecules
  • B. number of collisions between the molecules
  • C. density of the molecules
  • D. free mean path between each molecules and other
View Answer & Discuss (9) JAMB 1988
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1174
The forces holding naphthalene crystals together can be overcome when naphthalene is heated to a temperature of 354K resulting in the crystal to melting. These forces are known as?
  • A. coulombic
  • B. ionic
  • C. covalent
  • D. Van der waals
View Answer & Discuss (2) JAMB 1988
1175
A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons are there in this ion?
  • A. 20
  • B. 18
  • C. 16
  • D. 2
View Answer & Discuss (16) JAMB 1988
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