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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. L.fcc
Excess electrons form a donor band close in energy to the conduction band
4/sqrt(2) * r
Allows AC to be converted to DC
Conductivity increases with T

2. Closo-; nido-; arachno- boranes
N=n; n+4; n+6
Role of Lewis base in coordination chemistry
Involved in biological methyl transfer
Contain freely moving electrons

3. p-n junction
Involved in biological methyl transfer
Magnetic moment = v(n*(n+2))
Allows AC to be converted to DC
An atom has been displaced to another site

4. Schottky defect
An atom is missing from its usual site
Contain freely moving electrons
4/sqrt(2) * r
Magnetic moment = v(n*(n+2))

5. Frenkel defect
Involved in biological methyl transfer
Electron holes are formed by promotion of valence band electrons to the acceptor band
Contain freely moving electrons
An atom has been displaced to another site

6. p-type conductivity
Electron holes are formed by promotion of valence band electrons to the acceptor band
4/sqrt(2) * r
Role of Lewis base in coordination chemistry
More soluble

7. Intrinsic defect
Fe(II)
Allows AC to be converted to DC
Excess electrons form a donor band close in energy to the conduction band
Determined by thermodynamics (Increased entropy)

8. Hapticity
Determined by synthetic conditions
N=n; n+4; n+6
An atom is missing from its usual site
# of atoms of a ligand attached to a metal atom

9. Ferrous
Role of Lewis base in coordination chemistry
An atom is missing from its usual site
Recovered by electrolysis of molten salt
Fe(II)

10. Nuclear Radius
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))
(1.33x10^-13)* v(A)
Recovered by electrolysis of molten salt

11. Extrinsic defect
Determined by synthetic conditions
Conductivity increases with T
Role of Lewis base in coordination chemistry
Forms ammonia from nitrogen

12. Haber Process
More soluble
Forms ammonia from nitrogen
Involved in biological methyl transfer
Determined by synthetic conditions

13. Ligand / chelator
Role of Lewis base in coordination chemistry
Contain freely moving electrons
A
Fe(II)

14. Conduction band
4/sqrt(2) * r
(1.33x10^-13)* v(A)
Unfully occupied orbital - potentially overlapping
An atom has been displaced to another site

15. Alkali metals
Contain freely moving electrons
Recovered by electrolysis of molten salt
Involved in biological methyl transfer
Use low amount of current to regulate large amount

16. Valence Band
Role of Lewis base in coordination chemistry
4/sqrt(3) * r
Contain freely moving electrons
Allows AC to be converted to DC

17. Larger difference in atomic radii
More soluble
Unfully occupied orbital - potentially overlapping
4/sqrt(2) * r
An atom is missing from its usual site

18. Semiconductor
A
Conductivity increases with T
Determined by synthetic conditions
Involved in biological methyl transfer

19. Cobalamin
4/sqrt(3) * r
N=n; n+4; n+6
Involved in biological methyl transfer
Allows AC to be converted to DC

20. Paramagnetism
Magnetic moment = v(n*(n+2))
4/sqrt(3) * r
4/sqrt(2) * r
Determined by synthetic conditions

21. n-type conductivity
Insulator which is doped with other elements
4/sqrt(2) * r
Excess electrons form a donor band close in energy to the conduction band
Magnetic moment = v(n*(n+2))

22. Atomic Number
Fe(II)
Z
Excess electrons form a donor band close in energy to the conduction band
Magnetic moment = v(n*(n+2))

23. Mass Number
Contain freely moving electrons
Determined by thermodynamics (Increased entropy)
Use low amount of current to regulate large amount
A

24. L.bcc
An atom has been displaced to another site
4/sqrt(3) * r
Determined by synthetic conditions
An atom is missing from its usual site

25. Transistor
An atom is missing from its usual site
Use low amount of current to regulate large amount
Involved in biological methyl transfer
Allows AC to be converted to DC

26. Extrinsic semiconductor
(1.33x10^-13)* v(A)
Insulator which is doped with other elements
Use low amount of current to regulate large amount
Excess electrons form a donor band close in energy to the conduction band

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