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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
Use low amount of current to regulate large amount
An atom has been displaced to another site
A
(1.33x10^-13)* ³v(A)

2. Conduction band
Contain freely moving electrons
Unfully occupied orbital - potentially overlapping
Allows AC to be converted to DC
4/sqrt(2) * r

3. Ligand / chelator
Determined by synthetic conditions
Unfully occupied orbital - potentially overlapping
Role of Lewis base in coordination chemistry
Electron holes are formed by promotion of valence band electrons to the acceptor band

4. p-type conductivity
A
Role of Lewis base in coordination chemistry
Determined by synthetic conditions
Electron holes are formed by promotion of valence band electrons to the acceptor band

5. Atomic Number
Fe(II)
Z
Contain freely moving electrons
# of atoms of a ligand attached to a metal atom

6. Mass Number
(1.33x10^-13)* ³v(A)
A
Excess electrons form a donor band close in energy to the conduction band
Magnetic moment = v(n*(n+2))

7. Paramagnetism
An atom is missing from its usual site
Determined by synthetic conditions
Role of Lewis base in coordination chemistry
Magnetic moment = v(n*(n+2))

8. Intrinsic defect
Determined by thermodynamics (Increased entropy)
Fe(II)
An atom is missing from its usual site
Magnetic moment = v(n*(n+2))

9. Ferrous
Role of Lewis base in coordination chemistry
Conductivity increases with T
Fe(II)
# of atoms of a ligand attached to a metal atom

10. L.fcc
4/sqrt(3) * r
More soluble
Role of Lewis base in coordination chemistry
4/sqrt(2) * r

11. Valence Band
Contain freely moving electrons
Involved in biological methyl transfer
Insulator which is doped with other elements
N=n; n+4; n+6

12. Schottky defect
N=n; n+4; n+6
A
An atom has been displaced to another site
An atom is missing from its usual site

13. Extrinsic defect
Determined by thermodynamics (Increased entropy)
Unfully occupied orbital - potentially overlapping
Involved in biological methyl transfer
Determined by synthetic conditions

14. Transistor
Determined by synthetic conditions
Fe(II)
A
Use low amount of current to regulate large amount

15. Larger difference in atomic radii
More soluble
Allows AC to be converted to DC
Z
An atom has been displaced to another site

16. Hapticity
# of atoms of a ligand attached to a metal atom
Determined by synthetic conditions
Involved in biological methyl transfer
Forms ammonia from nitrogen

17. Extrinsic semiconductor
Contain freely moving electrons
An atom has been displaced to another site
Insulator which is doped with other elements
(1.33x10^-13)* ³v(A)

18. Cobalamin
Unfully occupied orbital - potentially overlapping
# of atoms of a ligand attached to a metal atom
A
Involved in biological methyl transfer

19. Semiconductor
An atom is missing from its usual site
A
Conductivity increases with T
Determined by thermodynamics (Increased entropy)

20. Haber Process
4/sqrt(3) * r
An atom is missing from its usual site
# of atoms of a ligand attached to a metal atom
Forms ammonia from nitrogen

21. Alkali metals
N=n; n+4; n+6
Recovered by electrolysis of molten salt
(1.33x10^-13)* ³v(A)
Excess electrons form a donor band close in energy to the conduction band

22. Closo-; nido-; arachno- boranes
Determined by synthetic conditions
Unfully occupied orbital - potentially overlapping
A
N=n; n+4; n+6

23. L.bcc
4/sqrt(3) * r
More soluble
Allows AC to be converted to DC
A

24. Nuclear Radius
An atom is missing from its usual site
Z
Forms ammonia from nitrogen
(1.33x10^-13)* ³v(A)

25. n-type conductivity
Unfully occupied orbital - potentially overlapping
Excess electrons form a donor band close in energy to the conduction band
Electron holes are formed by promotion of valence band electrons to the acceptor band
An atom is missing from its usual site

26. p-n junction
An atom has been displaced to another site
A
Magnetic moment = v(n*(n+2))
Allows AC to be converted to DC