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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. Ligand / chelator
Recovered by electrolysis of molten salt
Role of Lewis base in coordination chemistry
4/sqrt(3) * r
# of atoms of a ligand attached to a metal atom

2. Ferrous
Allows AC to be converted to DC
Fe(II)
Recovered by electrolysis of molten salt
Magnetic moment = v(n*(n+2))

3. Transistor
Insulator which is doped with other elements
N=n; n+4; n+6
Role of Lewis base in coordination chemistry
Use low amount of current to regulate large amount

4. Nuclear Radius
An atom is missing from its usual site
N=n; n+4; n+6
(1.33x10^-13)* ³v(A)
Fe(II)

5. p-n junction
Recovered by electrolysis of molten salt
Unfully occupied orbital - potentially overlapping
Insulator which is doped with other elements
Allows AC to be converted to DC

6. Semiconductor
Conductivity increases with T
Fe(II)
Excess electrons form a donor band close in energy to the conduction band
Electron holes are formed by promotion of valence band electrons to the acceptor band

7. Extrinsic defect
Determined by synthetic conditions
Z
Unfully occupied orbital - potentially overlapping
Excess electrons form a donor band close in energy to the conduction band

8. Closo-; nido-; arachno- boranes
Contain freely moving electrons
A
N=n; n+4; n+6
More soluble

9. Valence Band
Contain freely moving electrons
Recovered by electrolysis of molten salt
4/sqrt(2) * r
Electron holes are formed by promotion of valence band electrons to the acceptor band

10. n-type conductivity
4/sqrt(3) * r
Involved in biological methyl transfer
Contain freely moving electrons
Excess electrons form a donor band close in energy to the conduction band

11. Atomic Number
Z
Involved in biological methyl transfer
An atom is missing from its usual site
More soluble

12. Frenkel defect
Use low amount of current to regulate large amount
4/sqrt(2) * r
An atom has been displaced to another site
Role of Lewis base in coordination chemistry

13. Schottky defect
Insulator which is doped with other elements
Excess electrons form a donor band close in energy to the conduction band
Unfully occupied orbital - potentially overlapping
An atom is missing from its usual site

14. L.bcc
Fe(II)
Allows AC to be converted to DC
Conductivity increases with T
4/sqrt(3) * r

15. Conduction band
Fe(II)
Magnetic moment = v(n*(n+2))
Involved in biological methyl transfer
Unfully occupied orbital - potentially overlapping

16. Alkali metals
Recovered by electrolysis of molten salt
Insulator which is doped with other elements
Z
An atom is missing from its usual site

17. Larger difference in atomic radii
More soluble
Involved in biological methyl transfer
A
Electron holes are formed by promotion of valence band electrons to the acceptor band

18. Extrinsic semiconductor
Forms ammonia from nitrogen
An atom is missing from its usual site
Insulator which is doped with other elements
Allows AC to be converted to DC

19. Intrinsic defect
Determined by thermodynamics (Increased entropy)
Role of Lewis base in coordination chemistry
Allows AC to be converted to DC
Use low amount of current to regulate large amount

20. Paramagnetism
Allows AC to be converted to DC
Contain freely moving electrons
Involved in biological methyl transfer
Magnetic moment = v(n*(n+2))

21. Cobalamin
Use low amount of current to regulate large amount
Involved in biological methyl transfer
Contain freely moving electrons
Forms ammonia from nitrogen

22. Hapticity
# of atoms of a ligand attached to a metal atom
Recovered by electrolysis of molten salt
An atom is missing from its usual site
Z

23. Haber Process
4/sqrt(3) * r
Allows AC to be converted to DC
Forms ammonia from nitrogen
A

24. p-type conductivity
Contain freely moving electrons
4/sqrt(2) * r
(1.33x10^-13)* ³v(A)
Electron holes are formed by promotion of valence band electrons to the acceptor band

25. Mass Number
An atom has been displaced to another site
N=n; n+4; n+6
A
Fe(II)

26. L.fcc
Contain freely moving electrons
N=n; n+4; n+6
4/sqrt(2) * r
Determined by thermodynamics (Increased entropy)