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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
4/sqrt(2) * r
Role of Lewis base in coordination chemistry
Forms ammonia from nitrogen
Insulator which is doped with other elements

2. Semiconductor
Insulator which is doped with other elements
Z
Conductivity increases with T
Fe(II)

3. n-type conductivity
Unfully occupied orbital - potentially overlapping
Excess electrons form a donor band close in energy to the conduction band
An atom has been displaced to another site
Recovered by electrolysis of molten salt

4. Transistor
Use low amount of current to regulate large amount
Involved in biological methyl transfer
Unfully occupied orbital - potentially overlapping
An atom is missing from its usual site

5. L.fcc
More soluble
Conductivity increases with T
4/sqrt(3) * r
4/sqrt(2) * r

6. Schottky defect
N=n; n+4; n+6
Involved in biological methyl transfer
An atom is missing from its usual site
Role of Lewis base in coordination chemistry

7. Valence Band
Use low amount of current to regulate large amount
Z
More soluble
Contain freely moving electrons

8. Closo-; nido-; arachno- boranes
An atom is missing from its usual site
Role of Lewis base in coordination chemistry
N=n; n+4; n+6
Fe(II)

9. Haber Process
Forms ammonia from nitrogen
# of atoms of a ligand attached to a metal atom
Determined by thermodynamics (Increased entropy)
Recovered by electrolysis of molten salt

10. Atomic Number
Magnetic moment = v(n*(n+2))
Z
Use low amount of current to regulate large amount
(1.33x10^-13)* ³v(A)

11. Paramagnetism
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))
A
Unfully occupied orbital - potentially overlapping

12. Frenkel defect
Contain freely moving electrons
An atom has been displaced to another site
Involved in biological methyl transfer
Use low amount of current to regulate large amount

13. Cobalamin
Z
Determined by synthetic conditions
Involved in biological methyl transfer
Fe(II)

14. Mass Number
Contain freely moving electrons
A
Involved in biological methyl transfer
Determined by synthetic conditions

15. p-n junction
Determined by thermodynamics (Increased entropy)
Fe(II)
Role of Lewis base in coordination chemistry
Allows AC to be converted to DC

16. p-type conductivity
An atom has been displaced to another site
Use low amount of current to regulate large amount
Electron holes are formed by promotion of valence band electrons to the acceptor band
Z

17. Extrinsic defect
Determined by synthetic conditions
An atom has been displaced to another site
Recovered by electrolysis of molten salt
More soluble

18. Extrinsic semiconductor
Determined by synthetic conditions
Insulator which is doped with other elements
Determined by thermodynamics (Increased entropy)
Role of Lewis base in coordination chemistry

19. Hapticity
# of atoms of a ligand attached to a metal atom
Electron holes are formed by promotion of valence band electrons to the acceptor band
A
Determined by synthetic conditions

20. Nuclear Radius
More soluble
4/sqrt(3) * r
(1.33x10^-13)* ³v(A)
# of atoms of a ligand attached to a metal atom

21. Intrinsic defect
# of atoms of a ligand attached to a metal atom
Determined by thermodynamics (Increased entropy)
More soluble
An atom has been displaced to another site

22. Larger difference in atomic radii
(1.33x10^-13)* ³v(A)
More soluble
N=n; n+4; n+6
Involved in biological methyl transfer

23. L.bcc
4/sqrt(3) * r
Determined by thermodynamics (Increased entropy)
Magnetic moment = v(n*(n+2))
Recovered by electrolysis of molten salt

24. Ferrous
Forms ammonia from nitrogen
Magnetic moment = v(n*(n+2))
An atom is missing from its usual site
Fe(II)

25. Alkali metals
Determined by thermodynamics (Increased entropy)
4/sqrt(3) * r
Recovered by electrolysis of molten salt
Use low amount of current to regulate large amount

26. Conduction band
Unfully occupied orbital - potentially overlapping
Fe(II)
A
Involved in biological methyl transfer