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GRE Chemistry Inorganic

Instructions:

Answer 26 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Frenkel defect
4/sqrt(3) * r
An atom has been displaced to another site
Forms ammonia from nitrogen
More soluble

2. Ferrous
Contain freely moving electrons
Fe(II)
(1.33x10^-13)* ³v(A)
Magnetic moment = v(n*(n+2))

3. L.fcc
Recovered by electrolysis of molten salt
Conductivity increases with T
Role of Lewis base in coordination chemistry
4/sqrt(2) * r

4. n-type conductivity
Insulator which is doped with other elements
An atom has been displaced to another site
Conductivity increases with T
Excess electrons form a donor band close in energy to the conduction band

5. Haber Process
Recovered by electrolysis of molten salt
Conductivity increases with T
Involved in biological methyl transfer
Forms ammonia from nitrogen

6. Extrinsic semiconductor
Magnetic moment = v(n*(n+2))
Use low amount of current to regulate large amount
Insulator which is doped with other elements
(1.33x10^-13)* ³v(A)

7. Closo-; nido-; arachno- boranes
N=n; n+4; n+6
Determined by thermodynamics (Increased entropy)
Excess electrons form a donor band close in energy to the conduction band
Insulator which is doped with other elements

8. Transistor
Electron holes are formed by promotion of valence band electrons to the acceptor band
Magnetic moment = v(n*(n+2))
Use low amount of current to regulate large amount
4/sqrt(3) * r

9. Atomic Number
Z
Conductivity increases with T
Magnetic moment = v(n*(n+2))
4/sqrt(3) * r

10. Mass Number
Contain freely moving electrons
A
4/sqrt(2) * r
Determined by synthetic conditions

11. Schottky defect
Determined by synthetic conditions
An atom is missing from its usual site
4/sqrt(2) * r
Insulator which is doped with other elements

12. L.bcc
4/sqrt(3) * r
# of atoms of a ligand attached to a metal atom
Insulator which is doped with other elements
Determined by synthetic conditions

13. Intrinsic defect
Contain freely moving electrons
Fe(II)
Insulator which is doped with other elements
Determined by thermodynamics (Increased entropy)

14. Valence Band
Electron holes are formed by promotion of valence band electrons to the acceptor band
Contain freely moving electrons
Insulator which is doped with other elements
4/sqrt(3) * r

15. Extrinsic defect
Forms ammonia from nitrogen
Z
Determined by synthetic conditions
Allows AC to be converted to DC

16. Hapticity
Unfully occupied orbital - potentially overlapping
# of atoms of a ligand attached to a metal atom
N=n; n+4; n+6
An atom has been displaced to another site

17. p-n junction
A
Involved in biological methyl transfer
Allows AC to be converted to DC
Contain freely moving electrons

18. Nuclear Radius
Allows AC to be converted to DC
(1.33x10^-13)* ³v(A)
Determined by thermodynamics (Increased entropy)
Excess electrons form a donor band close in energy to the conduction band

19. Larger difference in atomic radii
More soluble
A
Electron holes are formed by promotion of valence band electrons to the acceptor band
An atom has been displaced to another site

20. Cobalamin
Unfully occupied orbital - potentially overlapping
Involved in biological methyl transfer
Fe(II)
Recovered by electrolysis of molten salt

21. Semiconductor
Conductivity increases with T
Recovered by electrolysis of molten salt
Unfully occupied orbital - potentially overlapping
Role of Lewis base in coordination chemistry

22. Ligand / chelator
4/sqrt(3) * r
Use low amount of current to regulate large amount
Role of Lewis base in coordination chemistry
Fe(II)

23. Alkali metals
Magnetic moment = v(n*(n+2))
Role of Lewis base in coordination chemistry
More soluble
Recovered by electrolysis of molten salt

24. Paramagnetism
Magnetic moment = v(n*(n+2))
N=n; n+4; n+6
Contain freely moving electrons
Involved in biological methyl transfer

25. Conduction band
Involved in biological methyl transfer
(1.33x10^-13)* ³v(A)
Magnetic moment = v(n*(n+2))
Unfully occupied orbital - potentially overlapping

26. p-type conductivity
# of atoms of a ligand attached to a metal atom
Contain freely moving electrons
Electron holes are formed by promotion of valence band electrons to the acceptor band
Magnetic moment = v(n*(n+2))