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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. Valence Band
Excess electrons form a donor band close in energy to the conduction band
(1.33x10^-13)* ³v(A)
Fe(II)
Contain freely moving electrons

2. Paramagnetism
# of atoms of a ligand attached to a metal atom
Magnetic moment = v(n*(n+2))
A
Determined by synthetic conditions

3. Conduction band
# of atoms of a ligand attached to a metal atom
N=n; n+4; n+6
An atom is missing from its usual site
Unfully occupied orbital - potentially overlapping

4. Transistor
Unfully occupied orbital - potentially overlapping
Use low amount of current to regulate large amount
# of atoms of a ligand attached to a metal atom
Excess electrons form a donor band close in energy to the conduction band

5. Ferrous
# of atoms of a ligand attached to a metal atom
Allows AC to be converted to DC
Excess electrons form a donor band close in energy to the conduction band
Fe(II)

6. n-type conductivity
Conductivity increases with T
Magnetic moment = v(n*(n+2))
Excess electrons form a donor band close in energy to the conduction band
Fe(II)

7. Intrinsic defect
Determined by thermodynamics (Increased entropy)
Determined by synthetic conditions
Contain freely moving electrons
Insulator which is doped with other elements

8. p-n junction
Excess electrons form a donor band close in energy to the conduction band
An atom is missing from its usual site
Allows AC to be converted to DC
4/sqrt(3) * r

9. Closo-; nido-; arachno- boranes
Use low amount of current to regulate large amount
Insulator which is doped with other elements
Fe(II)
N=n; n+4; n+6

10. Alkali metals
Involved in biological methyl transfer
Use low amount of current to regulate large amount
Allows AC to be converted to DC
Recovered by electrolysis of molten salt

11. Semiconductor
Involved in biological methyl transfer
# of atoms of a ligand attached to a metal atom
A
Conductivity increases with T

12. Cobalamin
Use low amount of current to regulate large amount
Allows AC to be converted to DC
Involved in biological methyl transfer
4/sqrt(3) * r

13. Extrinsic semiconductor
Role of Lewis base in coordination chemistry
Determined by thermodynamics (Increased entropy)
Insulator which is doped with other elements
N=n; n+4; n+6

14. Ligand / chelator
Role of Lewis base in coordination chemistry
More soluble
Excess electrons form a donor band close in energy to the conduction band
Forms ammonia from nitrogen

15. p-type conductivity
Electron holes are formed by promotion of valence band electrons to the acceptor band
Insulator which is doped with other elements
More soluble
An atom is missing from its usual site

16. L.fcc
Involved in biological methyl transfer
4/sqrt(2) * r
Fe(II)
Conductivity increases with T

17. Larger difference in atomic radii
An atom has been displaced to another site
More soluble
Electron holes are formed by promotion of valence band electrons to the acceptor band
Conductivity increases with T

18. Frenkel defect
A
Use low amount of current to regulate large amount
An atom has been displaced to another site
Fe(II)

19. Schottky defect
Fe(II)
An atom is missing from its usual site
Insulator which is doped with other elements
Magnetic moment = v(n*(n+2))

20. Haber Process
Involved in biological methyl transfer
A
An atom is missing from its usual site
Forms ammonia from nitrogen

21. Hapticity
# of atoms of a ligand attached to a metal atom
Determined by thermodynamics (Increased entropy)
4/sqrt(2) * r
A

22. Extrinsic defect
Excess electrons form a donor band close in energy to the conduction band
Role of Lewis base in coordination chemistry
Determined by synthetic conditions
Magnetic moment = v(n*(n+2))

23. L.bcc
Contain freely moving electrons
Unfully occupied orbital - potentially overlapping
Conductivity increases with T
4/sqrt(3) * r

24. Nuclear Radius
Forms ammonia from nitrogen
(1.33x10^-13)* ³v(A)
An atom has been displaced to another site
Unfully occupied orbital - potentially overlapping

25. Mass Number
A
More soluble
Excess electrons form a donor band close in energy to the conduction band
Determined by thermodynamics (Increased entropy)

26. Atomic Number
4/sqrt(2) * r
Fe(II)
Z
An atom has been displaced to another site