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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.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. Frenkel defect
More soluble
An atom has been displaced to another site
Electron holes are formed by promotion of valence band electrons to the acceptor band
# of atoms of a ligand attached to a metal atom

2. Paramagnetism
# of atoms of a ligand attached to a metal atom
4/sqrt(2) * r
Conductivity increases with T
Magnetic moment = v(n*(n+2))

3. Schottky defect
Z
Fe(II)
Allows AC to be converted to DC
An atom is missing from its usual site

4. Larger difference in atomic radii
Magnetic moment = v(n*(n+2))
Allows AC to be converted to DC
Use low amount of current to regulate large amount
More soluble

5. Alkali metals
An atom has been displaced to another site
Recovered by electrolysis of molten salt
Excess electrons form a donor band close in energy to the conduction band
A

6. L.fcc
N=n; n+4; n+6
Conductivity increases with T
4/sqrt(2) * r
Electron holes are formed by promotion of valence band electrons to the acceptor band

7. Cobalamin
# of atoms of a ligand attached to a metal atom
More soluble
Involved in biological methyl transfer
Forms ammonia from nitrogen

8. p-n junction
Insulator which is doped with other elements
Use low amount of current to regulate large amount
A
Allows AC to be converted to DC

9. Hapticity
Excess electrons form a donor band close in energy to the conduction band
Role of Lewis base in coordination chemistry
Magnetic moment = v(n*(n+2))
# of atoms of a ligand attached to a metal atom

10. Closo-; nido-; arachno- boranes
Unfully occupied orbital - potentially overlapping
Use low amount of current to regulate large amount
Z
N=n; n+4; n+6

11. L.bcc
Role of Lewis base in coordination chemistry
Magnetic moment = v(n*(n+2))
4/sqrt(3) * r
N=n; n+4; n+6

12. Transistor
Electron holes are formed by promotion of valence band electrons to the acceptor band
4/sqrt(2) * r
Use low amount of current to regulate large amount
Z

13. Ligand / chelator
More soluble
Role of Lewis base in coordination chemistry
Allows AC to be converted to DC
Electron holes are formed by promotion of valence band electrons to the acceptor band

14. p-type conductivity
Contain freely moving electrons
Electron holes are formed by promotion of valence band electrons to the acceptor band
Role of Lewis base in coordination chemistry
Determined by thermodynamics (Increased entropy)

15. Valence Band
Contain freely moving electrons
Recovered by electrolysis of molten salt
4/sqrt(2) * r
Forms ammonia from nitrogen

16. Nuclear Radius
(1.33x10^-13)* ³v(A)
A
N=n; n+4; n+6
Involved in biological methyl transfer

17. Mass Number
Use low amount of current to regulate large amount
More soluble
Forms ammonia from nitrogen
A

18. Intrinsic defect
More soluble
Conductivity increases with T
Fe(II)
Determined by thermodynamics (Increased entropy)

19. n-type conductivity
4/sqrt(2) * r
Role of Lewis base in coordination chemistry
Use low amount of current to regulate large amount
Excess electrons form a donor band close in energy to the conduction band

20. Conduction band
4/sqrt(3) * r
Unfully occupied orbital - potentially overlapping
Electron holes are formed by promotion of valence band electrons to the acceptor band
Determined by thermodynamics (Increased entropy)

21. Extrinsic semiconductor
Conductivity increases with T
Insulator which is doped with other elements
Z
An atom has been displaced to another site

22. Haber Process
Electron holes are formed by promotion of valence band electrons to the acceptor band
Allows AC to be converted to DC
Forms ammonia from nitrogen
Involved in biological methyl transfer

23. Semiconductor
Conductivity increases with T
Insulator which is doped with other elements
Forms ammonia from nitrogen
Magnetic moment = v(n*(n+2))

24. Extrinsic defect
Recovered by electrolysis of molten salt
Conductivity increases with T
Determined by synthetic conditions
# of atoms of a ligand attached to a metal atom

25. Ferrous
Fe(II)
Role of Lewis base in coordination chemistry
A
An atom is missing from its usual site

26. Atomic Number
An atom is missing from its usual site
Z
Contain freely moving electrons
4/sqrt(2) * r