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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. Valence Band
Contain freely moving electrons
4/sqrt(3) * r
Magnetic moment = v(n*(n+2))
Excess electrons form a donor band close in energy to the conduction band

2. Intrinsic defect
Fe(II)
N=n; n+4; n+6
Role of Lewis base in coordination chemistry
Determined by thermodynamics (Increased entropy)

3. Frenkel defect
An atom has been displaced to another site
Determined by thermodynamics (Increased entropy)
Magnetic moment = v(n*(n+2))
Determined by synthetic conditions

4. Atomic Number
Z
Magnetic moment = v(n*(n+2))
An atom has been displaced to another site
Forms ammonia from nitrogen

5. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
Recovered by electrolysis of molten salt
Allows AC to be converted to DC
Electron holes are formed by promotion of valence band electrons to the acceptor band

6. p-n junction
Conductivity increases with T
Allows AC to be converted to DC
An atom is missing from its usual site
Electron holes are formed by promotion of valence band electrons to the acceptor band

7. Extrinsic semiconductor
An atom has been displaced to another site
Role of Lewis base in coordination chemistry
Insulator which is doped with other elements
Excess electrons form a donor band close in energy to the conduction band

8. L.fcc
Allows AC to be converted to DC
4/sqrt(2) * r
Involved in biological methyl transfer
Role of Lewis base in coordination chemistry

9. Ligand / chelator
Z
Determined by synthetic conditions
Determined by thermodynamics (Increased entropy)
Role of Lewis base in coordination chemistry

10. L.bcc
N=n; n+4; n+6
4/sqrt(3) * r
Forms ammonia from nitrogen
Determined by thermodynamics (Increased entropy)

11. Transistor
Use low amount of current to regulate large amount
Allows AC to be converted to DC
Fe(II)
Insulator which is doped with other elements

12. Nuclear Radius
(1.33x10^-13)* ³v(A)
Z
Excess electrons form a donor band close in energy to the conduction band
Magnetic moment = v(n*(n+2))

13. Semiconductor
N=n; n+4; n+6
Conductivity increases with T
Excess electrons form a donor band close in energy to the conduction band
Involved in biological methyl transfer

14. Cobalamin
Involved in biological methyl transfer
N=n; n+4; n+6
Conductivity increases with T
Role of Lewis base in coordination chemistry

15. Schottky defect
Z
An atom is missing from its usual site
A
Determined by thermodynamics (Increased entropy)

16. Haber Process
Recovered by electrolysis of molten salt
Forms ammonia from nitrogen
Magnetic moment = v(n*(n+2))
Excess electrons form a donor band close in energy to the conduction band

17. Alkali metals
Allows AC to be converted to DC
(1.33x10^-13)* ³v(A)
Recovered by electrolysis of molten salt
Unfully occupied orbital - potentially overlapping

18. Paramagnetism
4/sqrt(2) * r
Magnetic moment = v(n*(n+2))
Conductivity increases with T
An atom has been displaced to another site

19. Closo-; nido-; arachno- boranes
Insulator which is doped with other elements
A
Excess electrons form a donor band close in energy to the conduction band
N=n; n+4; n+6

20. Hapticity
# of atoms of a ligand attached to a metal atom
Determined by synthetic conditions
More soluble
Forms ammonia from nitrogen

21. Conduction band
A
Role of Lewis base in coordination chemistry
Conductivity increases with T
Unfully occupied orbital - potentially overlapping

22. Larger difference in atomic radii
Determined by synthetic conditions
More soluble
Involved in biological methyl transfer
(1.33x10^-13)* ³v(A)

23. Ferrous
Forms ammonia from nitrogen
Contain freely moving electrons
Involved in biological methyl transfer
Fe(II)

24. Mass Number
A
Use low amount of current to regulate large amount
4/sqrt(3) * r
Determined by synthetic conditions

25. Extrinsic defect
(1.33x10^-13)* ³v(A)
Conductivity increases with T
Contain freely moving electrons
Determined by synthetic conditions

26. p-type conductivity
Z
Determined by thermodynamics (Increased entropy)
# of atoms of a ligand attached to a metal atom
Electron holes are formed by promotion of valence band electrons to the acceptor band