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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. Valence Band
Contain freely moving electrons
Role of Lewis base in coordination chemistry
Determined by thermodynamics (Increased entropy)
N=n; n+4; n+6

2. Transistor
An atom has been displaced to another site
Use low amount of current to regulate large amount
Excess electrons form a donor band close in energy to the conduction band
4/sqrt(3) * r

3. Semiconductor
Conductivity increases with T
An atom is missing from its usual site
Unfully occupied orbital - potentially overlapping
Electron holes are formed by promotion of valence band electrons to the acceptor band

4. Cobalamin
Z
Forms ammonia from nitrogen
N=n; n+4; n+6
Involved in biological methyl transfer

5. L.fcc
4/sqrt(3) * r
Determined by synthetic conditions
Electron holes are formed by promotion of valence band electrons to the acceptor band
4/sqrt(2) * r

6. Extrinsic semiconductor
Fe(II)
Insulator which is doped with other elements
Forms ammonia from nitrogen
A

7. Alkali metals
Determined by thermodynamics (Increased entropy)
A
# of atoms of a ligand attached to a metal atom
Recovered by electrolysis of molten salt

8. Conduction band
Allows AC to be converted to DC
Unfully occupied orbital - potentially overlapping
(1.33x10^-13)* v(A)
4/sqrt(2) * r

9. Hapticity
Involved in biological methyl transfer
An atom has been displaced to another site
# of atoms of a ligand attached to a metal atom
Allows AC to be converted to DC

10. Intrinsic defect
Electron holes are formed by promotion of valence band electrons to the acceptor band
Unfully occupied orbital - potentially overlapping
Determined by thermodynamics (Increased entropy)
4/sqrt(3) * r

11. p-type conductivity
An atom is missing from its usual site
Contain freely moving electrons
Excess electrons form a donor band close in energy to the conduction band
Electron holes are formed by promotion of valence band electrons to the acceptor band

12. n-type conductivity
Use low amount of current to regulate large amount
Role of Lewis base in coordination chemistry
Excess electrons form a donor band close in energy to the conduction band
Allows AC to be converted to DC

13. Larger difference in atomic radii
More soluble
Use low amount of current to regulate large amount
Electron holes are formed by promotion of valence band electrons to the acceptor band
Z

14. Atomic Number
(1.33x10^-13)* v(A)
Conductivity increases with T
Z
Unfully occupied orbital - potentially overlapping

15. Extrinsic defect
Allows AC to be converted to DC
Determined by synthetic conditions
(1.33x10^-13)* v(A)
An atom has been displaced to another site

16. Frenkel defect
Fe(II)
An atom has been displaced to another site
4/sqrt(2) * r
4/sqrt(3) * r

17. L.bcc
4/sqrt(3) * r
Conductivity increases with T
(1.33x10^-13)* v(A)
Magnetic moment = v(n*(n+2))

18. Closo-; nido-; arachno- boranes
Fe(II)
N=n; n+4; n+6
More soluble
Unfully occupied orbital - potentially overlapping

19. Mass Number
N=n; n+4; n+6
Allows AC to be converted to DC
A
More soluble

20. Ferrous
Conductivity increases with T
Magnetic moment = v(n*(n+2))
Fe(II)
Contain freely moving electrons

21. Paramagnetism
Role of Lewis base in coordination chemistry
Magnetic moment = v(n*(n+2))
Involved in biological methyl transfer
Forms ammonia from nitrogen

22. Ligand / chelator
N=n; n+4; n+6
4/sqrt(2) * r
Role of Lewis base in coordination chemistry
Unfully occupied orbital - potentially overlapping

23. Schottky defect
N=n; n+4; n+6
Electron holes are formed by promotion of valence band electrons to the acceptor band
Use low amount of current to regulate large amount
An atom is missing from its usual site

24. p-n junction
N=n; n+4; n+6
Determined by synthetic conditions
Allows AC to be converted to DC
Role of Lewis base in coordination chemistry

25. Nuclear Radius
More soluble
Conductivity increases with T
An atom has been displaced to another site
(1.33x10^-13)* v(A)

26. Haber Process
# of atoms of a ligand attached to a metal atom
4/sqrt(2) * r
Forms ammonia from nitrogen
An atom has been displaced to another site

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