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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. Hapticity
Electron holes are formed by promotion of valence band electrons to the acceptor band
Role of Lewis base in coordination chemistry
Z
# of atoms of a ligand attached to a metal atom

2. Frenkel defect
4/sqrt(3) * r
An atom has been displaced to another site
Forms ammonia from nitrogen
N=n; n+4; n+6

3. Valence Band
Magnetic moment = v(n*(n+2))
Contain freely moving electrons
Use low amount of current to regulate large amount
Excess electrons form a donor band close in energy to the conduction band

4. Nuclear Radius
(1.33x10^-13)* v(A)
Electron holes are formed by promotion of valence band electrons to the acceptor band
Z
Conductivity increases with T

5. L.bcc
Determined by synthetic conditions
Insulator which is doped with other elements
Unfully occupied orbital - potentially overlapping
4/sqrt(3) * r

6. L.fcc
4/sqrt(2) * r
(1.33x10^-13)* v(A)
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))

7. Transistor
Conductivity increases with T
Forms ammonia from nitrogen
Use low amount of current to regulate large amount
Determined by thermodynamics (Increased entropy)

8. Cobalamin
More soluble
4/sqrt(2) * r
Role of Lewis base in coordination chemistry
Involved in biological methyl transfer

9. Extrinsic defect
Conductivity increases with T
Electron holes are formed by promotion of valence band electrons to the acceptor band
Determined by synthetic conditions
(1.33x10^-13)* v(A)

10. Mass Number
A
Conductivity increases with T
Determined by synthetic conditions
4/sqrt(3) * r

11. Ferrous
Electron holes are formed by promotion of valence band electrons to the acceptor band
# of atoms of a ligand attached to a metal atom
Fe(II)
Recovered by electrolysis of molten salt

12. Semiconductor
Contain freely moving electrons
(1.33x10^-13)* v(A)
Allows AC to be converted to DC
Conductivity increases with T

13. Extrinsic semiconductor
Insulator which is doped with other elements
Involved in biological methyl transfer
Fe(II)
Determined by thermodynamics (Increased entropy)

14. Intrinsic defect
Determined by thermodynamics (Increased entropy)
Insulator which is doped with other elements
Allows AC to be converted to DC
An atom is missing from its usual site

15. Conduction band
Fe(II)
Excess electrons form a donor band close in energy to the conduction band
Allows AC to be converted to DC
Unfully occupied orbital - potentially overlapping

16. p-type conductivity
4/sqrt(3) * r
An atom has been displaced to another site
Insulator which is doped with other elements
Electron holes are formed by promotion of valence band electrons to the acceptor band

17. Ligand / chelator
Role of Lewis base in coordination chemistry
Recovered by electrolysis of molten salt
Electron holes are formed by promotion of valence band electrons to the acceptor band
(1.33x10^-13)* v(A)

18. Haber Process
Forms ammonia from nitrogen
(1.33x10^-13)* v(A)
N=n; n+4; n+6
Determined by thermodynamics (Increased entropy)

19. Larger difference in atomic radii
More soluble
Role of Lewis base in coordination chemistry
Contain freely moving electrons
Magnetic moment = v(n*(n+2))

20. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
Contain freely moving electrons
Forms ammonia from nitrogen
Determined by synthetic conditions

21. Alkali metals
Recovered by electrolysis of molten salt
More soluble
Forms ammonia from nitrogen
An atom has been displaced to another site

22. Closo-; nido-; arachno- boranes
4/sqrt(3) * r
Z
Contain freely moving electrons
N=n; n+4; n+6

23. Schottky defect
(1.33x10^-13)* v(A)
Magnetic moment = v(n*(n+2))
Insulator which is doped with other elements
An atom is missing from its usual site

24. Atomic Number
4/sqrt(2) * r
Determined by thermodynamics (Increased entropy)
Z
A

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

26. p-n junction
Allows AC to be converted to DC
Contain freely moving electrons
An atom has been displaced to another site
A

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