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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. Haber Process
Use low amount of current to regulate large amount
Forms ammonia from nitrogen
(1.33x10^-13)* ³v(A)
Excess electrons form a donor band close in energy to the conduction band

2. Intrinsic defect
Z
Magnetic moment = v(n*(n+2))
4/sqrt(2) * r
Determined by thermodynamics (Increased entropy)

3. Transistor
A
4/sqrt(2) * r
Use low amount of current to regulate large amount
(1.33x10^-13)* ³v(A)

4. Paramagnetism
Magnetic moment = v(n*(n+2))
Determined by thermodynamics (Increased entropy)
Z
Conductivity increases with T

5. Larger difference in atomic radii
Forms ammonia from nitrogen
An atom is missing from its usual site
Conductivity increases with T
More soluble

6. Extrinsic defect
Determined by synthetic conditions
Forms ammonia from nitrogen
(1.33x10^-13)* ³v(A)
Magnetic moment = v(n*(n+2))

7. Alkali metals
Recovered by electrolysis of molten salt
Forms ammonia from nitrogen
4/sqrt(2) * r
A

8. Cobalamin
Determined by synthetic conditions
Forms ammonia from nitrogen
Allows AC to be converted to DC
Involved in biological methyl transfer

9. Valence Band
Contain freely moving electrons
Role of Lewis base in coordination chemistry
# of atoms of a ligand attached to a metal atom
Determined by thermodynamics (Increased entropy)

10. p-type conductivity
Electron holes are formed by promotion of valence band electrons to the acceptor band
Contain freely moving electrons
Role of Lewis base in coordination chemistry
(1.33x10^-13)* ³v(A)

11. L.fcc
4/sqrt(2) * r
Excess electrons form a donor band close in energy to the conduction band
Recovered by electrolysis of molten salt
A

12. Frenkel defect
4/sqrt(2) * r
Use low amount of current to regulate large amount
An atom has been displaced to another site
Unfully occupied orbital - potentially overlapping

13. Mass Number
Conductivity increases with T
A
Insulator which is doped with other elements
(1.33x10^-13)* ³v(A)

14. Conduction band
An atom is missing from its usual site
Unfully occupied orbital - potentially overlapping
Fe(II)
Insulator which is doped with other elements

15. Ligand / chelator
Contain freely moving electrons
(1.33x10^-13)* ³v(A)
Role of Lewis base in coordination chemistry
Recovered by electrolysis of molten salt

16. Extrinsic semiconductor
Insulator which is doped with other elements
Fe(II)
Conductivity increases with T
Involved in biological methyl transfer

17. Hapticity
# of atoms of a ligand attached to a metal atom
An atom is missing from its usual site
Unfully occupied orbital - potentially overlapping
Allows AC to be converted to DC

18. Closo-; nido-; arachno- boranes
N=n; n+4; n+6
An atom has been displaced to another site
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

19. L.bcc
4/sqrt(3) * r
Determined by thermodynamics (Increased entropy)
Determined by synthetic conditions
Involved in biological methyl transfer

20. Semiconductor
# of atoms of a ligand attached to a metal atom
Determined by synthetic conditions
(1.33x10^-13)* ³v(A)
Conductivity increases with T

21. Schottky defect
Magnetic moment = v(n*(n+2))
4/sqrt(3) * r
An atom is missing from its usual site
4/sqrt(2) * r

22. Ferrous
Unfully occupied orbital - potentially overlapping
Fe(II)
Electron holes are formed by promotion of valence band electrons to the acceptor band
(1.33x10^-13)* ³v(A)

23. Nuclear Radius
(1.33x10^-13)* ³v(A)
Role of Lewis base in coordination chemistry
4/sqrt(2) * r
Determined by thermodynamics (Increased entropy)

24. n-type conductivity
Determined by synthetic conditions
# of atoms of a ligand attached to a metal atom
Excess electrons form a donor band close in energy to the conduction band
N=n; n+4; n+6

25. Atomic Number
Role of Lewis base in coordination chemistry
Fe(II)
Allows AC to be converted to DC
Z

26. p-n junction
4/sqrt(2) * r
Unfully occupied orbital - potentially overlapping
A
Allows AC to be converted to DC