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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
Z
4/sqrt(2) * r
Magnetic moment = v(n*(n+2))
Role of Lewis base in coordination chemistry

2. Alkali metals
Forms ammonia from nitrogen
Excess electrons form a donor band close in energy to the conduction band
Determined by thermodynamics (Increased entropy)
Recovered by electrolysis of molten salt

3. Mass Number
(1.33x10^-13)* ³v(A)
More soluble
N=n; n+4; n+6
A

4. Frenkel defect
An atom has been displaced to another site
4/sqrt(2) * r
Insulator which is doped with other elements
Forms ammonia from nitrogen

5. Extrinsic defect
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))
Z
4/sqrt(3) * r

6. Intrinsic defect
Allows AC to be converted to DC
Determined by thermodynamics (Increased entropy)
Conductivity increases with T
Contain freely moving electrons

7. Conduction band
Unfully occupied orbital - potentially overlapping
An atom has been displaced to another site
Magnetic moment = v(n*(n+2))
Forms ammonia from nitrogen

8. Semiconductor
Contain freely moving electrons
Conductivity increases with T
Z
A

9. Closo-; nido-; arachno- boranes
N=n; n+4; n+6
Unfully occupied orbital - potentially overlapping
Forms ammonia from nitrogen
Insulator which is doped with other elements

10. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
N=n; n+4; n+6
Fe(II)
Forms ammonia from nitrogen

11. p-n junction
Role of Lewis base in coordination chemistry
Allows AC to be converted to DC
Unfully occupied orbital - potentially overlapping
Conductivity increases with T

12. Valence Band
Fe(II)
Role of Lewis base in coordination chemistry
Contain freely moving electrons
4/sqrt(2) * r

13. L.fcc
Determined by thermodynamics (Increased entropy)
Excess electrons form a donor band close in energy to the conduction band
An atom is missing from its usual site
4/sqrt(2) * r

14. Cobalamin
Unfully occupied orbital - potentially overlapping
Recovered by electrolysis of molten salt
4/sqrt(3) * r
Involved in biological methyl transfer

15. L.bcc
4/sqrt(3) * r
Role of Lewis base in coordination chemistry
Insulator which is doped with other elements
More soluble

16. Hapticity
# of atoms of a ligand attached to a metal atom
Determined by thermodynamics (Increased entropy)
Contain freely moving electrons
Z

17. Haber Process
Unfully occupied orbital - potentially overlapping
Forms ammonia from nitrogen
N=n; n+4; n+6
Allows AC to be converted to DC

18. Larger difference in atomic radii
Forms ammonia from nitrogen
More soluble
Insulator which is doped with other elements
# of atoms of a ligand attached to a metal atom

19. Ferrous
An atom has been displaced to another site
Allows AC to be converted to DC
Determined by thermodynamics (Increased entropy)
Fe(II)

20. Extrinsic semiconductor
4/sqrt(3) * r
Fe(II)
# of atoms of a ligand attached to a metal atom
Insulator which is doped with other elements

21. p-type conductivity
Determined by thermodynamics (Increased entropy)
Contain freely moving electrons
Magnetic moment = v(n*(n+2))
Electron holes are formed by promotion of valence band electrons to the acceptor band

22. Schottky defect
Determined by thermodynamics (Increased entropy)
An atom is missing from its usual site
Contain freely moving electrons
A

23. Paramagnetism
Involved in biological methyl transfer
4/sqrt(3) * r
Magnetic moment = v(n*(n+2))
A

24. Nuclear Radius
Unfully occupied orbital - potentially overlapping
(1.33x10^-13)* ³v(A)
Forms ammonia from nitrogen
Magnetic moment = v(n*(n+2))

25. Transistor
Involved in biological methyl transfer
Excess electrons form a donor band close in energy to the conduction band
More soluble
Use low amount of current to regulate large amount

26. Atomic Number
Z
N=n; n+4; n+6
Determined by thermodynamics (Increased entropy)
Forms ammonia from nitrogen