20.Within a period, an increase in atomic
number is usually accompanied by

A. a decrease in atomic radius and an

increase in electronegativity

B. an increase in atomic radius and an

increase in electronegativity

C. a decrease in atomic radius and a

decrease in electronegativity

D. an increase in atomic radius and a

decrease in electronegativity

E. None of these answer choices is

correct.

21. A molecule exhibits sp^3 d^2 hybridization
    in its bonding structure. The most
    probable geometric shape of this
    molecule is

A. triangular bipyramidal

B. T-shaped

C. octahedral

D. linear

E. hexagonal

22.What is the proper name of
[Co(NH 3 ) 5 Br]Cl 2?

A. Cobaltpentaamine bromo-

dichloride

B. Pentaamminecobalt(III) bromo-

dichloride

C. Dichlorocobalt(V)

bromodichloride

D. Dichloropentaaminecobalt(III)

bromide

E. Pentaaminebromocobalt(III)

chloride

23. Which one of the following does NOT
    show hydrogen bonding?

A. Ammonia, NH 3

B. Hydrazine, N 2 H 4

C. Hydrogen peroxide, H 2 O 2

D. Dimethyl ether, CH 3 OCH 3

E. Methyl alcohol, CH 3 OH

24. How many moles of solid Ca(NO 3 ) 2
    should be added to 450 milliliters of
    0.35 M Al(NO 3 ) 3 to increase the
    concentration of the NO 3 – ion to 1.7 M?
    (Assume that the volume of the solution
    remains constant.)

A. 0.07 mole

B. 0.15 mole

C. 0.29 mole

D. 0.45 mole

E. 0.77 mole

Questions 25–29

ggg gg

E dt

d

k

ABC DE

rate of formation of

E

AB

23 45

2

++" +

==

_____iiiii

6

66

@

@@

25. If one were to double the concentration
    of B, the rate of the reaction shown
    above would increase by a factor of

A.^1 ⁄ 2

B. 1

C. 2

D. 4

E. 8

Practice Test

Section

I

Multiple-Choice Questions

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