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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.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. n-type conductivity
Role of Lewis base in coordination chemistry
A
Excess electrons form a donor band close in energy to the conduction band
Fe(II)

2. Ligand / chelator
4/sqrt(2) * r
Conductivity increases with T
Contain freely moving electrons
Role of Lewis base in coordination chemistry

3. Extrinsic defect
Determined by synthetic conditions
Allows AC to be converted to DC
An atom is missing from its usual site
Recovered by electrolysis of molten salt

4. Extrinsic semiconductor
An atom has been displaced to another site
Determined by thermodynamics (Increased entropy)
Insulator which is doped with other elements
Determined by synthetic conditions

5. Valence Band
Contain freely moving electrons
An atom is missing from its usual site
Conductivity increases with T
Involved in biological methyl transfer

6. Semiconductor
Conductivity increases with T
Unfully occupied orbital - potentially overlapping
Magnetic moment = v(n*(n+2))
Use low amount of current to regulate large amount

7. Atomic Number
Contain freely moving electrons
# of atoms of a ligand attached to a metal atom
Z
Determined by synthetic conditions

8. Frenkel defect
Recovered by electrolysis of molten salt
Use low amount of current to regulate large amount
Excess electrons form a donor band close in energy to the conduction band
An atom has been displaced to another site

9. Schottky defect
Allows AC to be converted to DC
Contain freely moving electrons
An atom is missing from its usual site
4/sqrt(2) * r

10. L.fcc
Contain freely moving electrons
Magnetic moment = v(n*(n+2))
4/sqrt(2) * r
Fe(II)

11. Mass Number
Involved in biological methyl transfer
An atom has been displaced to another site
A
Electron holes are formed by promotion of valence band electrons to the acceptor band

12. Alkali metals
An atom is missing from its usual site
Electron holes are formed by promotion of valence band electrons to the acceptor band
Recovered by electrolysis of molten salt
Magnetic moment = v(n*(n+2))

13. Hapticity
(1.33x10^-13)* ³v(A)
# of atoms of a ligand attached to a metal atom
Magnetic moment = v(n*(n+2))
A

14. Paramagnetism
(1.33x10^-13)* ³v(A)
Involved in biological methyl transfer
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))

15. Larger difference in atomic radii
An atom has been displaced to another site
Recovered by electrolysis of molten salt
More soluble
Excess electrons form a donor band close in energy to the conduction band

16. p-n junction
Insulator which is doped with other elements
# of atoms of a ligand attached to a metal atom
More soluble
Allows AC to be converted to DC

17. Nuclear Radius
4/sqrt(3) * r
Recovered by electrolysis of molten salt
Fe(II)
(1.33x10^-13)* ³v(A)

18. Intrinsic defect
Magnetic moment = v(n*(n+2))
Determined by thermodynamics (Increased entropy)
Use low amount of current to regulate large amount
Fe(II)

19. Closo-; nido-; arachno- boranes
N=n; n+4; n+6
# of atoms of a ligand attached to a metal atom
An atom is missing from its usual site
Forms ammonia from nitrogen

20. Haber Process
Use low amount of current to regulate large amount
Forms ammonia from nitrogen
Determined by thermodynamics (Increased entropy)
4/sqrt(2) * r

21. L.bcc
4/sqrt(3) * r
A
Z
Fe(II)

22. Ferrous
Involved in biological methyl transfer
More soluble
Fe(II)
Insulator which is doped with other elements

23. Cobalamin
A
An atom has been displaced to another site
Magnetic moment = v(n*(n+2))
Involved in biological methyl transfer

24. Conduction band
Contain freely moving electrons
Magnetic moment = v(n*(n+2))
Unfully occupied orbital - potentially overlapping
Recovered by electrolysis of molten salt

25. p-type conductivity
Electron holes are formed by promotion of valence band electrons to the acceptor band
Allows AC to be converted to DC
N=n; n+4; n+6
Magnetic moment = v(n*(n+2))

26. Transistor
Use low amount of current to regulate large amount
Electron holes are formed by promotion of valence band electrons to the acceptor band
Forms ammonia from nitrogen
N=n; n+4; n+6