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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. p-n junction
A
Allows AC to be converted to DC
(1.33x10^-13)* v(A)
An atom is missing from its usual site

2. Ligand / chelator
(1.33x10^-13)* v(A)
Role of Lewis base in coordination chemistry
Use low amount of current to regulate large amount
Fe(II)

3. Mass Number
4/sqrt(2) * r
Contain freely moving electrons
A
Allows AC to be converted to DC

4. Closo-; nido-; arachno- boranes
N=n; n+4; n+6
Forms ammonia from nitrogen
4/sqrt(3) * r
Electron holes are formed by promotion of valence band electrons to the acceptor band

5. Haber Process
A
Determined by synthetic conditions
Recovered by electrolysis of molten salt
Forms ammonia from nitrogen

6. Frenkel defect
Determined by thermodynamics (Increased entropy)
An atom has been displaced to another site
An atom is missing from its usual site
Allows AC to be converted to DC

7. Conduction band
Unfully occupied orbital - potentially overlapping
Recovered by electrolysis of molten salt
Use low amount of current to regulate large amount
Role of Lewis base in coordination chemistry

8. Intrinsic defect
4/sqrt(2) * r
Determined by thermodynamics (Increased entropy)
Insulator which is doped with other elements
Determined by synthetic conditions

9. Paramagnetism
Conductivity increases with T
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))
Fe(II)

10. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
Role of Lewis base in coordination chemistry
A
Insulator which is doped with other elements

11. Ferrous
Unfully occupied orbital - potentially overlapping
Fe(II)
N=n; n+4; n+6
Determined by synthetic conditions

12. Valence Band
Contain freely moving electrons
An atom is missing from its usual site
Excess electrons form a donor band close in energy to the conduction band
Involved in biological methyl transfer

13. Cobalamin
Involved in biological methyl transfer
Use low amount of current to regulate large amount
Role of Lewis base in coordination chemistry
Z

14. Transistor
Use low amount of current to regulate large amount
Excess electrons form a donor band close in energy to the conduction band
Fe(II)
An atom has been displaced to another site

15. Extrinsic defect
Conductivity increases with T
Determined by synthetic conditions
Recovered by electrolysis of molten salt
Contain freely moving electrons

16. Atomic Number
A
Z
Determined by synthetic conditions
Use low amount of current to regulate large amount

17. Extrinsic semiconductor
An atom is missing from its usual site
Insulator which is doped with other elements
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))

18. p-type conductivity
An atom has been displaced to another site
Forms ammonia from nitrogen
Z
Electron holes are formed by promotion of valence band electrons to the acceptor band

19. L.bcc
More soluble
4/sqrt(3) * r
Unfully occupied orbital - potentially overlapping
Magnetic moment = v(n*(n+2))

20. L.fcc
4/sqrt(2) * r
A
Z
Magnetic moment = v(n*(n+2))

21. Semiconductor
N=n; n+4; n+6
An atom has been displaced to another site
Conductivity increases with T
4/sqrt(2) * r

22. Alkali metals
N=n; n+4; n+6
Role of Lewis base in coordination chemistry
(1.33x10^-13)* v(A)
Recovered by electrolysis of molten salt

23. Schottky defect
Use low amount of current to regulate large amount
An atom is missing from its usual site
An atom has been displaced to another site
Recovered by electrolysis of molten salt

24. Nuclear Radius
(1.33x10^-13)* v(A)
Insulator which is doped with other elements
4/sqrt(3) * r
Use low amount of current to regulate large amount

25. Hapticity
Contain freely moving electrons
# of atoms of a ligand attached to a metal atom
Excess electrons form a donor band close in energy to the conduction band
Conductivity increases with T

26. Larger difference in atomic radii
Determined by synthetic conditions
More soluble
Use low amount of current to regulate large amount
# of atoms of a ligand attached to a metal atom

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