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Twelfth Grade (Grade 12) Matter Questions

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Grade 12 Matter
Which of the following ionic solids has a face-centered cubic (FCC) structure?
  1. Sodium Chloride
  2. Cesium Chloride
  3. Zinc Blende
  4. Fluorite
Grade 12 Thermodynamics
In which of the following cases would ∆U in ∆U=Q+W be less than zero?
  1. Work is done on the system.
  2. Work is done by the system.
  3. The magnitudes of heat and work are equivalent.
  4. The magnitude of heat is greater than that of the work.
Grade 12 Thermodynamics
Which of the following conditions represents "standard state free energy of reaction" for a spontaneous reaction?
  1. ΔG0>0
  2. ΔG0<0
  3. ΔG0=0
  4. ΔG0>1
Grade 12 Thermodynamics
Which of the following is an example of an irreversible process?
  1. boiling of water
  2. chemical reaction in an insulated vessel
  3. expansion of gas infinitesimally slowly
  4. downhill flow of water
Grade 12 Matter
What is the size of nucleation clusters?
  1. 10-10 to 10-9 m
  2. 10-11 to 10-8 m
  3. 10-6 to 10-3 m
  4. 10-12 to 10-13 m
Grade 12 Quantum Physics and the Atom
Compton Scattering involves what kind of energy?
  1. low energy x-rays
  2. doesn't use any energy
  3. moderate energy x-rays
  4. very high energy x-rays
Grade 12 Matter
How can the law of conservation of mass apply to a burning log, if all that remains of it is ash?
  1. The ash has the same mass as the log, although a large percentage of it blows away.
  2. The law of conservation of mass applies to changes of state but not to chemical reactions.
  3. The law of conservation of mass applies to substitution and displacement reactions, but not to combustion reactions.
  4. The masses of the gases and water vapor released into the air by the combustion reaction plus the mass of ash equal the mass of the log before burning.
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