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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. Semiconductor
Involved in biological methyl transfer
Conductivity increases with T
4/sqrt(2) * r
N=n; n+4; n+6

2. Paramagnetism
Electron holes are formed by promotion of valence band electrons to the acceptor band
Magnetic moment = v(n*(n+2))
Allows AC to be converted to DC
Z

3. Cobalamin
Involved in biological methyl transfer
Determined by thermodynamics (Increased entropy)
A
(1.33x10^-13)* ³v(A)

4. Ligand / chelator
Role of Lewis base in coordination chemistry
Insulator which is doped with other elements
Allows AC to be converted to DC
Determined by synthetic conditions

5. Haber Process
Allows AC to be converted to DC
An atom has been displaced to another site
Forms ammonia from nitrogen
Z

6. Valence Band
Forms ammonia from nitrogen
A
Contain freely moving electrons
(1.33x10^-13)* ³v(A)

7. p-n junction
Insulator which is doped with other elements
Conductivity increases with T
Unfully occupied orbital - potentially overlapping
Allows AC to be converted to DC

8. Conduction band
Magnetic moment = v(n*(n+2))
An atom has been displaced to another site
4/sqrt(3) * r
Unfully occupied orbital - potentially overlapping

9. L.bcc
More soluble
Recovered by electrolysis of molten salt
Contain freely moving electrons
4/sqrt(3) * r

10. Alkali metals
Recovered by electrolysis of molten salt
Unfully occupied orbital - potentially overlapping
Forms ammonia from nitrogen
Insulator which is doped with other elements

11. Mass Number
More soluble
A
Insulator which is doped with other elements
N=n; n+4; n+6

12. p-type conductivity
An atom is missing from its usual site
Allows AC to be converted to DC
Electron holes are formed by promotion of valence band electrons to the acceptor band
N=n; n+4; n+6

13. Extrinsic semiconductor
Excess electrons form a donor band close in energy to the conduction band
Insulator which is doped with other elements
More soluble
4/sqrt(2) * r

14. L.fcc
4/sqrt(2) * r
Allows AC to be converted to DC
Contain freely moving electrons
Determined by thermodynamics (Increased entropy)

15. Intrinsic defect
4/sqrt(3) * r
Allows AC to be converted to DC
Determined by synthetic conditions
Determined by thermodynamics (Increased entropy)

16. Schottky defect
Magnetic moment = v(n*(n+2))
Use low amount of current to regulate large amount
An atom is missing from its usual site
Involved in biological methyl transfer

17. Closo-; nido-; arachno- boranes
N=n; n+4; n+6
Forms ammonia from nitrogen
Insulator which is doped with other elements
Role of Lewis base in coordination chemistry

18. Hapticity
Insulator which is doped with other elements
Use low amount of current to regulate large amount
# of atoms of a ligand attached to a metal atom
N=n; n+4; n+6

19. Frenkel defect
Recovered by electrolysis of molten salt
4/sqrt(2) * r
More soluble
An atom has been displaced to another site

20. Nuclear Radius
4/sqrt(3) * r
(1.33x10^-13)* ³v(A)
Allows AC to be converted to DC
Z

21. Larger difference in atomic radii
More soluble
Allows AC to be converted to DC
4/sqrt(3) * r
Unfully occupied orbital - potentially overlapping

22. Extrinsic defect
Determined by synthetic conditions
Involved in biological methyl transfer
Unfully occupied orbital - potentially overlapping
Contain freely moving electrons

23. Atomic Number
Use low amount of current to regulate large amount
Z
Recovered by electrolysis of molten salt
Electron holes are formed by promotion of valence band electrons to the acceptor band

24. Ferrous
Excess electrons form a donor band close in energy to the conduction band
4/sqrt(3) * r
# of atoms of a ligand attached to a metal atom
Fe(II)

25. n-type conductivity
Conductivity increases with T
An atom has been displaced to another site
Excess electrons form a donor band close in energy to the conduction band
Unfully occupied orbital - potentially overlapping

26. Transistor
Conductivity increases with T
Insulator which is doped with other elements
Use low amount of current to regulate large amount
An atom has been displaced to another site