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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. Haber Process
Forms ammonia from nitrogen
(1.33x10^-13)* v(A)
An atom has been displaced to another site
# of atoms of a ligand attached to a metal atom

2. Extrinsic semiconductor
Recovered by electrolysis of molten salt
A
Involved in biological methyl transfer
Insulator which is doped with other elements

3. Schottky defect
A
An atom is missing from its usual site
Z
Contain freely moving electrons

4. L.bcc
4/sqrt(3) * r
Electron holes are formed by promotion of valence band electrons to the acceptor band
Forms ammonia from nitrogen
Fe(II)

5. Closo-; nido-; arachno- boranes
Conductivity increases with T
Magnetic moment = v(n*(n+2))
(1.33x10^-13)* v(A)
N=n; n+4; n+6

6. Larger difference in atomic radii
N=n; n+4; n+6
An atom has been displaced to another site
Excess electrons form a donor band close in energy to the conduction band
More soluble

7. Mass Number
Contain freely moving electrons
Excess electrons form a donor band close in energy to the conduction band
Unfully occupied orbital - potentially overlapping
A

8. Intrinsic defect
Determined by thermodynamics (Increased entropy)
Forms ammonia from nitrogen
A
Determined by synthetic conditions

9. L.fcc
Z
An atom is missing from its usual site
4/sqrt(2) * r
More soluble

10. Valence Band
Unfully occupied orbital - potentially overlapping
Contain freely moving electrons
Fe(II)
Magnetic moment = v(n*(n+2))

11. Ferrous
Fe(II)
Use low amount of current to regulate large amount
N=n; n+4; n+6
Role of Lewis base in coordination chemistry

12. Alkali metals
Recovered by electrolysis of molten salt
(1.33x10^-13)* v(A)
Forms ammonia from nitrogen
# of atoms of a ligand attached to a metal atom

13. 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
Recovered by electrolysis of molten salt
Excess electrons form a donor band close in energy to the conduction band

14. n-type conductivity
Excess electrons form a donor band close in energy to the conduction band
Involved in biological methyl transfer
Conductivity increases with T
Allows AC to be converted to DC

15. Frenkel defect
Recovered by electrolysis of molten salt
An atom has been displaced to another site
Use low amount of current to regulate large amount
(1.33x10^-13)* v(A)

16. Nuclear Radius
Determined by thermodynamics (Increased entropy)
(1.33x10^-13)* v(A)
Involved in biological methyl transfer
N=n; n+4; n+6

17. Transistor
Use low amount of current to regulate large amount
(1.33x10^-13)* v(A)
Allows AC to be converted to DC
4/sqrt(3) * r

18. Ligand / chelator
Insulator which is doped with other elements
A
Z
Role of Lewis base in coordination chemistry

19. Atomic Number
Contain freely moving electrons
More soluble
Z
A

20. Cobalamin
# of atoms of a ligand attached to a metal atom
Fe(II)
Involved in biological methyl transfer
Allows AC to be converted to DC

21. Conduction band
Unfully occupied orbital - potentially overlapping
N=n; n+4; n+6
Determined by thermodynamics (Increased entropy)
# of atoms of a ligand attached to a metal atom

22. Paramagnetism
Forms ammonia from nitrogen
Conductivity increases with T
N=n; n+4; n+6
Magnetic moment = v(n*(n+2))

23. Extrinsic defect
Determined by thermodynamics (Increased entropy)
# of atoms of a ligand attached to a metal atom
A
Determined by synthetic conditions

24. p-n junction
Allows AC to be converted to DC
Determined by thermodynamics (Increased entropy)
Use low amount of current to regulate large amount
Recovered by electrolysis of molten salt

25. Hapticity
# of atoms of a ligand attached to a metal atom
Role of Lewis base in coordination chemistry
Determined by thermodynamics (Increased entropy)
An atom is missing from its usual site

26. Semiconductor
Use low amount of current to regulate large amount
Conductivity increases with T
Excess electrons form a donor band close in energy to the conduction band
# of atoms of a ligand attached to a metal atom

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GRE Chemistry Inorganic

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