Test your basic knowledge |

GRE Chemistry Inorganic

Instructions:

Answer 26 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. Intrinsic defect
# of atoms of a ligand attached to a metal atom
Determined by thermodynamics (Increased entropy)
Unfully occupied orbital - potentially overlapping
Excess electrons form a donor band close in energy to the conduction band

2. Frenkel defect
An atom has been displaced to another site
Determined by thermodynamics (Increased entropy)
# of atoms of a ligand attached to a metal atom
Conductivity increases with T

3. L.fcc
Z
4/sqrt(2) * r
(1.33x10^-13)* ³v(A)
Determined by thermodynamics (Increased entropy)

4. Closo-; nido-; arachno- boranes
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
# of atoms of a ligand attached to a metal atom
N=n; n+4; n+6

5. Extrinsic defect
Role of Lewis base in coordination chemistry
Determined by synthetic conditions
4/sqrt(2) * r
An atom has been displaced to another site

6. Larger difference in atomic radii
# of atoms of a ligand attached to a metal atom
4/sqrt(2) * r
More soluble
Determined by synthetic conditions

7. Nuclear Radius
Recovered by electrolysis of molten salt
# of atoms of a ligand attached to a metal atom
Contain freely moving electrons
(1.33x10^-13)* ³v(A)

8. L.bcc
4/sqrt(2) * r
Insulator which is doped with other elements
4/sqrt(3) * r
Determined by synthetic conditions

9. Cobalamin
An atom is missing from its usual site
Involved in biological methyl transfer
(1.33x10^-13)* ³v(A)
Recovered by electrolysis of molten salt

10. Schottky defect
Electron holes are formed by promotion of valence band electrons to the acceptor band
An atom has been displaced to another site
An atom is missing from its usual site
Unfully occupied orbital - potentially overlapping

11. Paramagnetism
Recovered by electrolysis of molten salt
Magnetic moment = v(n*(n+2))
An atom is missing from its usual site
Excess electrons form a donor band close in energy to the conduction band

12. Mass Number
Conductivity increases with T
A
More soluble
Insulator which is doped with other elements

13. Semiconductor
Allows AC to be converted to DC
(1.33x10^-13)* ³v(A)
Conductivity increases with T
Contain freely moving electrons

14. Haber Process
(1.33x10^-13)* ³v(A)
Role of Lewis base in coordination chemistry
Determined by thermodynamics (Increased entropy)
Forms ammonia from nitrogen

15. Conduction band
4/sqrt(2) * r
# of atoms of a ligand attached to a metal atom
Recovered by electrolysis of molten salt
Unfully occupied orbital - potentially overlapping

16. n-type conductivity
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
4/sqrt(2) * r

17. Hapticity
Conductivity increases with T
# of atoms of a ligand attached to a metal atom
Determined by synthetic conditions
Allows AC to be converted to DC

18. p-type conductivity
Electron holes are formed by promotion of valence band electrons to the acceptor band
(1.33x10^-13)* ³v(A)
Determined by synthetic conditions
Conductivity increases with T

19. p-n junction
Use low amount of current to regulate large amount
Allows AC to be converted to DC
4/sqrt(2) * r
Magnetic moment = v(n*(n+2))

20. Valence Band
Determined by synthetic conditions
Contain freely moving electrons
Magnetic moment = v(n*(n+2))
Electron holes are formed by promotion of valence band electrons to the acceptor band

21. Extrinsic semiconductor
Excess electrons form a donor band close in energy to the conduction band
Insulator which is doped with other elements
A
Unfully occupied orbital - potentially overlapping

22. Ferrous
Electron holes are formed by promotion of valence band electrons to the acceptor band
Insulator which is doped with other elements
4/sqrt(2) * r
Fe(II)

23. Atomic Number
A
Z
4/sqrt(2) * r
Fe(II)

24. Transistor
# of atoms of a ligand attached to a metal atom
An atom is missing from its usual site
Use low amount of current to regulate large amount
An atom has been displaced to another site

25. Alkali metals
Determined by synthetic conditions
More soluble
Recovered by electrolysis of molten salt
An atom is missing from its usual site

26. Ligand / chelator
(1.33x10^-13)* ³v(A)
Fe(II)
Determined by thermodynamics (Increased entropy)
Role of Lewis base in coordination chemistry