choose the right answer from the following 1-FLOURINE NEVER EXCEEDS AN OCTAT OF
ID: 783190 • Letter: C
Question
choose the right answer from the following
1-FLOURINE NEVER EXCEEDS AN OCTAT OF ELECTRONS (WHEREAS THE OTHER HALOGENS DO) THE BEST EXPLANATION FOR THIS IS:
a) flourine is the most electronegative atom.
b) flourine's high nuclear charge.
c) flourine only consists of one naturally occuring isotope.
d) the lack of low-energy d orbitals.
c) the necessity to obtain flourine by electrolysis.
2- ALL THE FOLLOWING ELEMENTS HAVE MORE THAN ONE NONZERO OXIDATION STATE EXCEPT:
a) N
b) O
c) Cl
d) P
e) F
3- INCREASING EFFECTIVE NUCLEAR CHARGE AND DECREASING ORBITAL SIZE RESULT IN DECREASING METALLIC CHARACTER. WITH RESPECT TO THE PERIODIC TABLE THE ELEMENTS WHICH ARE MOST METALLIC IN CHARACTER ARE FOUND:
a) in the upper left.
b) in the lower left.
c) in the upper right.
d) in the lower right.
4- WHAT IS THE GROUND-STATE ELECTRON CONFIGURATION OF Co^(2+):
a) [Ar]3d^4 4s^2
b) [Ar]3d^5
c) [Ar]3d^7
d) [Ar]3d^6 4s^1
e) [Ar]3d^5 4s^2
5- WHAT IS THE MAXIMUM OXIDATION STATE EXPECTED FOR CHROMIUM:
a) +2
b) +3
c) +4
d) +5
e) +6
6- A LIGAND IS:
a) bidentate.
b) a chelate.
c) a lewis base.
d) a lewis acid.
e) an ion.
7- THE BOND BETWEEN A METAL CATION AND LIGAND IS BEST CLASSIFIED AS A:
a) ionic bond.
b) polar covalent bond.
c) coordinate covalent bond.
d) nonpolar covalent bond.
e) polydentate bond.
8- ALL THE FOLLOWING PROPERTIES ARE CHARACTERISTIC OF MANY OF THE TRANSITION-ELEMENT COMPOUNDS EXCEPT:
a) most of them are paramagnetic.
b) most of them are colored.
c) most of the elements, upon ionizing, lose the d electrons first.
d) most of the metals exhibit multiple oxidation states.
e) most of the elements form many complexes.
9- WHICH OF THE FOLLOWING CATIONS WOULD HAVE THE MOST UNPAIRED ELECTRONS:
a) V^(+3)
b) Cr^(+3)
c) Fe^(+3)
d) Cu^(+1)
e) Zn^(+2)
10- WHICH OF THE FOLLOWING ELEMENTS WILL FORM BOTH A SOLUBLE NITRATE AND AN INSOLUBLE BROMIDE THAT ARE PHOTOSENSITIVE:
a)potassium.
b) iron.
c) copper.
d) silver.
e) zinc.
11- WHICH PROCESS(ES) IS (ARE) MOST LIKELY TO LEAD TO ACID RAIN?
1} pollutants from copper smelter.
2} the burning of coal containing sulfur.
3} excessive spraying of herbicides or insecticides.
a) 1 only.
b) 2 only.
c) 3 only.
d) 1 and 2.
e) 1,2 and 3.
12- WHAT IS THE CORRECT FORMULA FOR SODIUM TETRACHLOROCOBALTATE(II)?
a) Na2(CoCl6)
b) Na4(CoCl4)
c) Na(CoCl4)
d) Na2(CoCl4)
e) Na3(CoCl4)
13- WHAT IS THE CORRECT IUPAC NAME FOR [AuCl4(H2O)2]^(-1)?
a) diaquatetrachloroaurate(0)
b) diaquatetrachloroaurate(I)
c) diaquatetrachlorogold(I)
d) diaquatetrachloroaurate (III)
e) diaquatetrachlorogold (III)
14- THE MOST CHARACTERISTIC REACTION OF BENZENE IS:
a) oxidation.
b) reduction.
c) substitution.
d) addition.
e) addition and elimination.
15- A PEPTIDE BOND IS ALSO A ___________ FUNCTIONAL GROUP.
a) amide.
b) amine.
c) hemiacetal.
d) ether.
e) carboxylic acid.
16- POLYMERS OF AMINO ACID UNITS ARE CALLED:
a) carbohydrates.
b) proteins.
c) nucleic acids.
d) lipids.
e) metabolites.
17- CARBOHYDRATES ARE STORED IN MAMMALS AS:
a) cellulose.
b) glycogen.
c) glucose.
d) strach.
e) amylopectin.
Explanation / Answer
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