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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. Transistor
A
N=n; n+4; n+6
Use low amount of current to regulate large amount
Magnetic moment = v(n*(n+2))

2. Atomic Number
Z
Use low amount of current to regulate large amount
Electron holes are formed by promotion of valence band electrons to the acceptor band
An atom is missing from its usual site

3. Conduction band
Unfully occupied orbital - potentially overlapping
Determined by thermodynamics (Increased entropy)
Recovered by electrolysis of molten salt
N=n; n+4; n+6

4. Nuclear Radius
Fe(II)
4/sqrt(3) * r
(1.33x10^-13)* ³v(A)
Forms ammonia from nitrogen

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

6. Intrinsic defect
Fe(II)
Determined by thermodynamics (Increased entropy)
Excess electrons form a donor band close in energy to the conduction band
Allows AC to be converted to DC

7. p-n junction
4/sqrt(3) * r
Electron holes are formed by promotion of valence band electrons to the acceptor band
Allows AC to be converted to DC
Magnetic moment = v(n*(n+2))

8. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
Contain freely moving electrons
# of atoms of a ligand attached to a metal atom
Recovered by electrolysis of molten salt

9. Ligand / chelator
More soluble
Z
Role of Lewis base in coordination chemistry
Determined by thermodynamics (Increased entropy)

10. Frenkel defect
Allows AC to be converted to DC
A
Determined by thermodynamics (Increased entropy)
An atom has been displaced to another site

11. Mass Number
A
Forms ammonia from nitrogen
Conductivity increases with T
Use low amount of current to regulate large amount

12. L.fcc
4/sqrt(2) * r
4/sqrt(3) * r
Determined by thermodynamics (Increased entropy)
Allows AC to be converted to DC

13. Schottky defect
An atom is missing from its usual site
An atom has been displaced to another site
Determined by synthetic conditions
(1.33x10^-13)* ³v(A)

14. Larger difference in atomic radii
More soluble
Unfully occupied orbital - potentially overlapping
An atom has been displaced to another site
Allows AC to be converted to DC

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

16. Ferrous
Fe(II)
Contain freely moving electrons
More soluble
Z

17. Closo-; nido-; arachno- boranes
Insulator which is doped with other elements
Fe(II)
Z
N=n; n+4; n+6

18. Haber Process
An atom has been displaced to another site
Fe(II)
Contain freely moving electrons
Forms ammonia from nitrogen

19. Hapticity
An atom is missing from its usual site
An atom has been displaced to another site
Use low amount of current to regulate large amount
# of atoms of a ligand attached to a metal atom

20. Extrinsic defect
Determined by synthetic conditions
An atom has been displaced to another site
4/sqrt(3) * r
4/sqrt(2) * r

21. Semiconductor
Electron holes are formed by promotion of valence band electrons to the acceptor band
An atom is missing from its usual site
(1.33x10^-13)* ³v(A)
Conductivity increases with T

22. Valence Band
Fe(II)
Contain freely moving electrons
An atom has been displaced to another site
Z

23. p-type conductivity
Z
An atom is missing from its usual site
Electron holes are formed by promotion of valence band electrons to the acceptor band
More soluble

24. Alkali metals
Recovered by electrolysis of molten salt
An atom is missing from its usual site
Contain freely moving electrons
Role of Lewis base in coordination chemistry

25. Paramagnetism
N=n; n+4; n+6
4/sqrt(3) * r
Magnetic moment = v(n*(n+2))
Determined by thermodynamics (Increased entropy)

26. Extrinsic semiconductor
An atom is missing from its usual site
Insulator which is doped with other elements
Use low amount of current to regulate large amount
Electron holes are formed by promotion of valence band electrons to the acceptor band