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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. L.bcc
# of atoms of a ligand attached to a metal atom
4/sqrt(3) * r
Fe(II)
Z

2. Haber Process
Role of Lewis base in coordination chemistry
# of atoms of a ligand attached to a metal atom
Recovered by electrolysis of molten salt
Forms ammonia from nitrogen

3. Extrinsic semiconductor
More soluble
Allows AC to be converted to DC
Insulator which is doped with other elements
Determined by thermodynamics (Increased entropy)

4. Intrinsic defect
(1.33x10^-13)* v(A)
# of atoms of a ligand attached to a metal atom
Determined by thermodynamics (Increased entropy)
4/sqrt(3) * r

5. Ferrous
Insulator which is doped with other elements
Fe(II)
Z
Magnetic moment = v(n*(n+2))

6. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
Contain freely moving electrons
Forms ammonia from nitrogen
Electron holes are formed by promotion of valence band electrons to the acceptor band

7. Transistor
# of atoms of a ligand attached to a metal atom
Forms ammonia from nitrogen
Use low amount of current to regulate large amount
A

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

9. Ligand / chelator
# of atoms of a ligand attached to a metal atom
Forms ammonia from nitrogen
Role of Lewis base in coordination chemistry
An atom is missing from its usual site

10. Conduction band
Unfully occupied orbital - potentially overlapping
A
Allows AC to be converted to DC
Recovered by electrolysis of molten salt

11. p-type conductivity
An atom has been displaced to another site
Electron holes are formed by promotion of valence band electrons to the acceptor band
A
Conductivity increases with T

12. Extrinsic defect
Determined by synthetic conditions
N=n; n+4; n+6
Excess electrons form a donor band close in energy to the conduction band
Recovered by electrolysis of molten salt

13. Schottky defect
Role of Lewis base in coordination chemistry
An atom is missing from its usual site
Electron holes are formed by promotion of valence band electrons to the acceptor band
Determined by thermodynamics (Increased entropy)

14. Paramagnetism
Conductivity increases with T
A
Magnetic moment = v(n*(n+2))
Allows AC to be converted to DC

15. Nuclear Radius
(1.33x10^-13)* v(A)
N=n; n+4; n+6
# of atoms of a ligand attached to a metal atom
Recovered by electrolysis of molten salt

16. Atomic Number
An atom is missing from its usual site
Conductivity increases with T
Z
(1.33x10^-13)* v(A)

17. Valence Band
(1.33x10^-13)* v(A)
Z
Involved in biological methyl transfer
Contain freely moving electrons

18. Cobalamin
Role of Lewis base in coordination chemistry
Forms ammonia from nitrogen
Determined by synthetic conditions
Involved in biological methyl transfer

19. Frenkel defect
Magnetic moment = v(n*(n+2))
Insulator which is doped with other elements
Forms ammonia from nitrogen
An atom has been displaced to another site

20. Closo-; nido-; arachno- boranes
Contain freely moving electrons
4/sqrt(3) * r
Insulator which is doped with other elements
N=n; n+4; n+6

21. Semiconductor
Insulator which is doped with other elements
N=n; n+4; n+6
Conductivity increases with T
Magnetic moment = v(n*(n+2))

22. Mass Number
A
Excess electrons form a donor band close in energy to the conduction band
An atom is missing from its usual site
Electron holes are formed by promotion of valence band electrons to the acceptor band

23. p-n junction
Recovered by electrolysis of molten salt
(1.33x10^-13)* v(A)
Allows AC to be converted to DC
Unfully occupied orbital - potentially overlapping

24. Alkali metals
Recovered by electrolysis of molten salt
Insulator which is doped with other elements
A
Fe(II)

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

26. Larger difference in atomic radii
More soluble
Determined by thermodynamics (Increased entropy)
Role of Lewis base in coordination chemistry
Involved in biological methyl transfer

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