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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. Atomic Number
Contain freely moving electrons
Z
Conductivity increases with T
Forms ammonia from nitrogen

2. Ligand / chelator
(1.33x10^-13)* ³v(A)
Insulator which is doped with other elements
Role of Lewis base in coordination chemistry
# of atoms of a ligand attached to a metal atom

3. Extrinsic semiconductor
Insulator which is doped with other elements
4/sqrt(3) * r
Role of Lewis base in coordination chemistry
Electron holes are formed by promotion of valence band electrons to the acceptor band

4. Larger difference in atomic radii
N=n; n+4; n+6
Involved in biological methyl transfer
More soluble
Electron holes are formed by promotion of valence band electrons to the acceptor band

5. p-type conductivity
Involved in biological methyl transfer
Excess electrons form a donor band close in energy to the conduction band
Forms ammonia from nitrogen
Electron holes are formed by promotion of valence band electrons to the acceptor band

6. Closo-; nido-; arachno- boranes
Magnetic moment = v(n*(n+2))
Allows AC to be converted to DC
N=n; n+4; n+6
Excess electrons form a donor band close in energy to the conduction band

7. Extrinsic defect
Electron holes are formed by promotion of valence band electrons to the acceptor band
# of atoms of a ligand attached to a metal atom
N=n; n+4; n+6
Determined by synthetic conditions

8. Cobalamin
Electron holes are formed by promotion of valence band electrons to the acceptor band
Contain freely moving electrons
Determined by thermodynamics (Increased entropy)
Involved in biological methyl transfer

9. Nuclear Radius
4/sqrt(3) * r
Electron holes are formed by promotion of valence band electrons to the acceptor band
(1.33x10^-13)* ³v(A)
Recovered by electrolysis of molten salt

10. p-n junction
Determined by thermodynamics (Increased entropy)
4/sqrt(2) * r
Magnetic moment = v(n*(n+2))
Allows AC to be converted to DC

11. L.fcc
More soluble
Unfully occupied orbital - potentially overlapping
4/sqrt(2) * r
Magnetic moment = v(n*(n+2))

12. Alkali metals
Z
Forms ammonia from nitrogen
# of atoms of a ligand attached to a metal atom
Recovered by electrolysis of molten salt

13. Intrinsic defect
4/sqrt(3) * r
Determined by thermodynamics (Increased entropy)
# of atoms of a ligand attached to a metal atom
Magnetic moment = v(n*(n+2))

14. Ferrous
Unfully occupied orbital - potentially overlapping
Fe(II)
Recovered by electrolysis of molten salt
Z

15. Valence Band
Contain freely moving electrons
(1.33x10^-13)* ³v(A)
N=n; n+4; n+6
Conductivity increases with T

16. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
Unfully occupied orbital - potentially overlapping
Electron holes are formed by promotion of valence band electrons to the acceptor band
N=n; n+4; n+6

17. Conduction band
4/sqrt(3) * r
4/sqrt(2) * r
Unfully occupied orbital - potentially overlapping
Fe(II)

18. Hapticity
# of atoms of a ligand attached to a metal atom
Involved in biological methyl transfer
Recovered by electrolysis of molten salt
Insulator which is doped with other elements

19. Paramagnetism
An atom is missing from its usual site
Conductivity increases with T
Magnetic moment = v(n*(n+2))
4/sqrt(2) * r

20. Transistor
Use low amount of current to regulate large amount
Allows AC to be converted to DC
Conductivity increases with T
Recovered by electrolysis of molten salt

21. Frenkel defect
Involved in biological methyl transfer
A
An atom has been displaced to another site
Insulator which is doped with other elements

22. Schottky defect
An atom has been displaced to another site
An atom is missing from its usual site
Unfully occupied orbital - potentially overlapping
Excess electrons form a donor band close in energy to the conduction band

23. Mass Number
Use low amount of current to regulate large amount
Forms ammonia from nitrogen
Allows AC to be converted to DC
A

24. L.bcc
Unfully occupied orbital - potentially overlapping
Electron holes are formed by promotion of valence band electrons to the acceptor band
4/sqrt(3) * r
Magnetic moment = v(n*(n+2))

25. Haber Process
A
An atom has been displaced to another site
4/sqrt(3) * r
Forms ammonia from nitrogen

26. Semiconductor
Unfully occupied orbital - potentially overlapping
Fe(II)
4/sqrt(2) * r
Conductivity increases with T