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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. n-type conductivity
Magnetic moment = v(n*(n+2))
Contain freely moving electrons
Excess electrons form a donor band close in energy to the conduction band
Unfully occupied orbital - potentially overlapping

2. Valence Band
Allows AC to be converted to DC
Contain freely moving electrons
Z
A

3. Closo-; nido-; arachno- boranes
(1.33x10^-13)* ³v(A)
Forms ammonia from nitrogen
Use low amount of current to regulate large amount
N=n; n+4; n+6

4. L.bcc
4/sqrt(2) * r
Determined by synthetic conditions
Determined by thermodynamics (Increased entropy)
4/sqrt(3) * r

5. Conduction band
Z
Determined by synthetic conditions
4/sqrt(2) * r
Unfully occupied orbital - potentially overlapping

6. Mass Number
Excess electrons form a donor band close in energy to the conduction band
A
N=n; n+4; n+6
Determined by thermodynamics (Increased entropy)

7. L.fcc
Magnetic moment = v(n*(n+2))
4/sqrt(2) * r
Allows AC to be converted to DC
A

8. Intrinsic defect
4/sqrt(2) * r
More soluble
Insulator which is doped with other elements
Determined by thermodynamics (Increased entropy)

9. Ligand / chelator
4/sqrt(2) * r
Forms ammonia from nitrogen
A
Role of Lewis base in coordination chemistry

10. Nuclear Radius
An atom has been displaced to another site
Determined by thermodynamics (Increased entropy)
(1.33x10^-13)* ³v(A)
Unfully occupied orbital - potentially overlapping

11. Extrinsic defect
More soluble
Determined by synthetic conditions
Use low amount of current to regulate large amount
Determined by thermodynamics (Increased entropy)

12. Semiconductor
A
Unfully occupied orbital - potentially overlapping
Conductivity increases with T
Forms ammonia from nitrogen

13. p-n junction
4/sqrt(3) * r
Allows AC to be converted to DC
N=n; n+4; n+6
Excess electrons form a donor band close in energy to the conduction band

14. p-type conductivity
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
An atom has been displaced to another site

15. Haber Process
Electron holes are formed by promotion of valence band electrons to the acceptor band
N=n; n+4; n+6
Insulator which is doped with other elements
Forms ammonia from nitrogen

16. Alkali metals
(1.33x10^-13)* ³v(A)
Recovered by electrolysis of molten salt
Role of Lewis base in coordination chemistry
Involved in biological methyl transfer

17. Hapticity
Insulator which is doped with other elements
Contain freely moving electrons
# of atoms of a ligand attached to a metal atom
4/sqrt(3) * r

18. Ferrous
Excess electrons form a donor band close in energy to the conduction band
Role of Lewis base in coordination chemistry
Fe(II)
Forms ammonia from nitrogen

19. Cobalamin
Determined by thermodynamics (Increased entropy)
Recovered by electrolysis of molten salt
Involved in biological methyl transfer
# of atoms of a ligand attached to a metal atom

20. Frenkel defect
An atom has been displaced to another site
Use low amount of current to regulate large amount
Allows AC to be converted to DC
A

21. Atomic Number
Unfully occupied orbital - potentially overlapping
Z
Use low amount of current to regulate large amount
4/sqrt(2) * r

22. Paramagnetism
An atom is missing from its usual site
N=n; n+4; n+6
Electron holes are formed by promotion of valence band electrons to the acceptor band
Magnetic moment = v(n*(n+2))

23. Schottky defect
(1.33x10^-13)* ³v(A)
An atom is missing from its usual site
Excess electrons form a donor band close in energy to the conduction band
Magnetic moment = v(n*(n+2))

24. Extrinsic semiconductor
An atom has been displaced to another site
Insulator which is doped with other elements
Excess electrons form a donor band close in energy to the conduction band
Recovered by electrolysis of molten salt

25. Larger difference in atomic radii
4/sqrt(2) * r
Recovered by electrolysis of molten salt
N=n; n+4; n+6
More soluble

26. Transistor
Involved in biological methyl transfer
Fe(II)
Use low amount of current to regulate large amount
4/sqrt(3) * r