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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. Conduction band
Involved in biological methyl transfer
Unfully occupied orbital - potentially overlapping
Forms ammonia from nitrogen
# of atoms of a ligand attached to a metal atom

2. Nuclear Radius
Forms ammonia from nitrogen
4/sqrt(3) * r
(1.33x10^-13)* ³v(A)
N=n; n+4; n+6

3. Intrinsic defect
Determined by thermodynamics (Increased entropy)
Insulator which is doped with other elements
Determined by synthetic conditions
(1.33x10^-13)* ³v(A)

4. p-type conductivity
Conductivity increases with T
Involved in biological methyl transfer
# of atoms of a ligand attached to a metal atom
Electron holes are formed by promotion of valence band electrons to the acceptor band

5. Closo-; nido-; arachno- boranes
A
N=n; n+4; n+6
4/sqrt(3) * r
An atom is missing from its usual site

6. Transistor
Insulator which is doped with other elements
Fe(II)
4/sqrt(2) * r
Use low amount of current to regulate large amount

7. Ligand / chelator
Electron holes are formed by promotion of valence band electrons to the acceptor band
Contain freely moving electrons
Role of Lewis base in coordination chemistry
Magnetic moment = v(n*(n+2))

8. Ferrous
Recovered by electrolysis of molten salt
Fe(II)
# of atoms of a ligand attached to a metal atom
Magnetic moment = v(n*(n+2))

9. Extrinsic defect
Unfully occupied orbital - potentially overlapping
A
Magnetic moment = v(n*(n+2))
Determined by synthetic conditions

10. Haber Process
Forms ammonia from nitrogen
Use low amount of current to regulate large amount
An atom is missing from its usual site
Conductivity increases with T

11. Cobalamin
# of atoms of a ligand attached to a metal atom
Z
Unfully occupied orbital - potentially overlapping
Involved in biological methyl transfer

12. Extrinsic semiconductor
A
Role of Lewis base in coordination chemistry
Insulator which is doped with other elements
4/sqrt(3) * r

13. Semiconductor
Fe(II)
Involved in biological methyl transfer
Insulator which is doped with other elements
Conductivity increases with T

14. Hapticity
Excess electrons form a donor band close in energy to the conduction band
Magnetic moment = v(n*(n+2))
# of atoms of a ligand attached to a metal atom
Allows AC to be converted to DC

15. L.bcc
4/sqrt(3) * r
Determined by thermodynamics (Increased entropy)
Role of Lewis base in coordination chemistry
A

16. L.fcc
An atom has been displaced to another site
4/sqrt(2) * r
Determined by synthetic conditions
Involved in biological methyl transfer

17. Schottky defect
Recovered by electrolysis of molten salt
Magnetic moment = v(n*(n+2))
An atom is missing from its usual site
Unfully occupied orbital - potentially overlapping

18. n-type conductivity
Determined by synthetic conditions
Excess electrons form a donor band close in energy to the conduction band
(1.33x10^-13)* ³v(A)
Insulator which is doped with other elements

19. Paramagnetism
Magnetic moment = v(n*(n+2))
Forms ammonia from nitrogen
4/sqrt(2) * r
(1.33x10^-13)* ³v(A)

20. p-n junction
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))
Allows AC to be converted to DC
# of atoms of a ligand attached to a metal atom

21. Larger difference in atomic radii
Determined by thermodynamics (Increased entropy)
More soluble
Insulator which is doped with other elements
Fe(II)

22. Frenkel defect
Unfully occupied orbital - potentially overlapping
Magnetic moment = v(n*(n+2))
Conductivity increases with T
An atom has been displaced to another site

23. Mass Number
4/sqrt(2) * r
A
Determined by synthetic conditions
Insulator which is doped with other elements

24. Atomic Number
Recovered by electrolysis of molten salt
4/sqrt(3) * r
Z
More soluble

25. Alkali metals
Recovered by electrolysis of molten salt
Determined by thermodynamics (Increased entropy)
An atom has been displaced to another site
Excess electrons form a donor band close in energy to the conduction band

26. Valence Band
# of atoms of a ligand attached to a metal atom
An atom is missing from its usual site
Determined by thermodynamics (Increased entropy)
Contain freely moving electrons