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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-type conductivity
Allows AC to be converted to DC
Role of Lewis base in coordination chemistry
Determined by synthetic conditions
Electron holes are formed by promotion of valence band electrons to the acceptor band

2. Valence Band
Contain freely moving electrons
Insulator which is doped with other elements
Recovered by electrolysis of molten salt
Role of Lewis base in coordination chemistry

3. Paramagnetism
Insulator which is doped with other elements
Magnetic moment = v(n*(n+2))
Recovered by electrolysis of molten salt
Excess electrons form a donor band close in energy to the conduction band

4. Conduction band
Unfully occupied orbital - potentially overlapping
Contain freely moving electrons
(1.33x10^-13)* ³v(A)
Use low amount of current to regulate large amount

5. p-n junction
A
Allows AC to be converted to DC
Excess electrons form a donor band close in energy to the conduction band
N=n; n+4; n+6

6. Nuclear Radius
Role of Lewis base in coordination chemistry
Involved in biological methyl transfer
(1.33x10^-13)* ³v(A)
Use low amount of current to regulate large amount

7. Alkali metals
4/sqrt(2) * r
Recovered by electrolysis of molten salt
Excess electrons form a donor band close in energy to the conduction band
Fe(II)

8. L.bcc
An atom has been displaced to another site
4/sqrt(3) * r
An atom is missing from its usual site
N=n; n+4; n+6

9. Ferrous
Role of Lewis base in coordination chemistry
Allows AC to be converted to DC
Fe(II)
Involved in biological methyl transfer

10. Mass Number
More soluble
Insulator which is doped with other elements
Z
A

11. L.fcc
More soluble
Insulator which is doped with other elements
Role of Lewis base in coordination chemistry
4/sqrt(2) * r

12. Transistor
A
Use low amount of current to regulate large amount
Z
Magnetic moment = v(n*(n+2))

13. Extrinsic defect
Electron holes are formed by promotion of valence band electrons to the acceptor band
Determined by synthetic conditions
Contain freely moving electrons
Z

14. Frenkel defect
A
An atom has been displaced to another site
Forms ammonia from nitrogen
4/sqrt(2) * r

15. Extrinsic semiconductor
Insulator which is doped with other elements
Fe(II)
N=n; n+4; n+6
Role of Lewis base in coordination chemistry

16. Intrinsic defect
A
Determined by thermodynamics (Increased entropy)
4/sqrt(3) * r
Magnetic moment = v(n*(n+2))

17. Cobalamin
# of atoms of a ligand attached to a metal atom
Involved in biological methyl transfer
Use low amount of current to regulate large amount
An atom is missing from its usual site

18. Semiconductor
Determined by thermodynamics (Increased entropy)
Conductivity increases with T
An atom has been displaced to another site
(1.33x10^-13)* ³v(A)

19. Schottky defect
An atom is missing from its usual site
4/sqrt(2) * r
Involved in biological methyl transfer
Role of Lewis base in coordination chemistry

20. Hapticity
Involved in biological methyl transfer
Allows AC to be converted to DC
Insulator which is doped with other elements
# of atoms of a ligand attached to a metal atom

21. Atomic Number
Use low amount of current to regulate large amount
Excess electrons form a donor band close in energy to the conduction band
# of atoms of a ligand attached to a metal atom
Z

22. Haber Process
(1.33x10^-13)* ³v(A)
4/sqrt(3) * r
Forms ammonia from nitrogen
Excess electrons form a donor band close in energy to the conduction band

23. Larger difference in atomic radii
An atom has been displaced to another site
Role of Lewis base in coordination chemistry
More soluble
Contain freely moving electrons

24. Closo-; nido-; arachno- boranes
More soluble
N=n; n+4; n+6
Fe(II)
An atom is missing from its usual site

25. n-type conductivity
Recovered by electrolysis of molten salt
Z
An atom has been displaced to another site
Excess electrons form a donor band close in energy to the conduction band

26. Ligand / chelator
Role of Lewis base in coordination chemistry
Unfully occupied orbital - potentially overlapping
Determined by thermodynamics (Increased entropy)
Involved in biological methyl transfer

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GRE Chemistry Inorganic

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