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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. Schottky defect
An atom is missing from its usual site
(1.33x10^-13)* ³v(A)
# of atoms of a ligand attached to a metal atom
Magnetic moment = v(n*(n+2))

2. Intrinsic defect
Determined by synthetic conditions
Determined by thermodynamics (Increased entropy)
Magnetic moment = v(n*(n+2))
Involved in biological methyl transfer

3. p-n junction
N=n; n+4; n+6
Allows AC to be converted to DC
Role of Lewis base in coordination chemistry
Conductivity increases with T

4. Paramagnetism
Recovered by electrolysis of molten salt
Magnetic moment = v(n*(n+2))
Role of Lewis base in coordination chemistry
(1.33x10^-13)* ³v(A)

5. L.bcc
4/sqrt(3) * r
An atom is missing from its usual site
Involved in biological methyl transfer
Electron holes are formed by promotion of valence band electrons to the acceptor band

6. Ligand / chelator
Recovered by electrolysis of molten salt
Role of Lewis base in coordination chemistry
Excess electrons form a donor band close in energy to the conduction band
More soluble

7. Conduction band
More soluble
N=n; n+4; n+6
Unfully occupied orbital - potentially overlapping
Use low amount of current to regulate large amount

8. Larger difference in atomic radii
Determined by synthetic conditions
Determined by thermodynamics (Increased entropy)
A
More soluble

9. L.fcc
4/sqrt(2) * r
(1.33x10^-13)* ³v(A)
N=n; n+4; n+6
A

10. Extrinsic semiconductor
Conductivity increases with T
Involved in biological methyl transfer
Insulator which is doped with other elements
More soluble

11. Frenkel defect
An atom has been displaced to another site
Forms ammonia from nitrogen
Contain freely moving electrons
Electron holes are formed by promotion of valence band electrons to the acceptor band

12. Nuclear Radius
(1.33x10^-13)* ³v(A)
Contain freely moving electrons
Conductivity increases with T
Magnetic moment = v(n*(n+2))

13. Valence Band
Determined by synthetic conditions
Contain freely moving electrons
Z
Conductivity increases with T

14. Cobalamin
Determined by thermodynamics (Increased entropy)
More soluble
Allows AC to be converted to DC
Involved in biological methyl transfer

15. Hapticity
Conductivity increases with T
Forms ammonia from nitrogen
An atom is missing from its usual site
# of atoms of a ligand attached to a metal atom

16. Semiconductor
Conductivity increases with T
4/sqrt(2) * r
(1.33x10^-13)* ³v(A)
Excess electrons form a donor band close in energy to the conduction band

17. Ferrous
Magnetic moment = v(n*(n+2))
# of atoms of a ligand attached to a metal atom
Excess electrons form a donor band close in energy to the conduction band
Fe(II)

18. Closo-; nido-; arachno- boranes
N=n; n+4; n+6
Insulator which is doped with other elements
Contain freely moving electrons
4/sqrt(3) * r

19. Haber Process
Excess electrons form a donor band close in energy to the conduction band
N=n; n+4; n+6
(1.33x10^-13)* ³v(A)
Forms ammonia from nitrogen

20. p-type conductivity
Electron holes are formed by promotion of valence band electrons to the acceptor band
Use low amount of current to regulate large amount
Role of Lewis base in coordination chemistry
Recovered by electrolysis of molten salt

21. Atomic Number
An atom is missing from its usual site
(1.33x10^-13)* ³v(A)
Recovered by electrolysis of molten salt
Z

22. Mass Number
Forms ammonia from nitrogen
A
4/sqrt(2) * r
Z

23. Extrinsic defect
Fe(II)
Determined by synthetic conditions
More soluble
Forms ammonia from nitrogen

24. Transistor
Electron holes are formed by promotion of valence band electrons to the acceptor band
Use low amount of current to regulate large amount
Determined by synthetic conditions
Role of Lewis base in coordination chemistry

25. Alkali metals
Forms ammonia from nitrogen
An atom has been displaced to another site
Determined by synthetic conditions
Recovered by electrolysis of molten salt

26. n-type conductivity
Conductivity increases with T
N=n; n+4; n+6
Excess electrons form a donor band close in energy to the conduction band
Determined by thermodynamics (Increased entropy)