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SciencebackChemistrybackIntroductory / Preparatory ChemistrybackChemistry An Introduction to General Organic and Biological ChemistrybackPractice Set 2498back

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Question 1
Free
Multiple Choice

The O-H bond in water is polar because ________ .

Choose correct answer/s
A

it is an ionic bond

B

oxygen is much more electronegative than hydrogen

C

oxygen occupies more space than hydrogen

D

hydrogen is much more electronegative than oxygen

E

it is a hydrogen bond

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Question 2
Free
Multiple Choice

A hydrogen bond is ________ .

Choose correct answer/s
A

an attractive force between molecules where partially positive hydrogen atoms are attracted to partially negative atoms of F,O,or N

B

a covalent bond between H and O

C

an ionic bond between H and another atom

D

a bond that is stronger than a covalent bond

E

the polar O-H bond in water

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Question 3
Free
Multiple Choice

In a solution,the solvent ________ .

Choose correct answer/s
A

is a liquid.

B

can be a liquid or gas.

C

can be a solid,liquid,or gas.

D

is never a solid.

E

is the substance present in the smallest concentration.

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Question 4
Free
Multiple Choice

Which of the following molecules can form hydrogen bonds?

Choose correct answer/s
A

image

B

NaH

C

image

D

image

E

HI

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Question 5
Free
Multiple Choice

A mixture is prepared by dissolving 2 g of KCl in 100 g of image O.In this mixture, image O is the ________ .

Choose correct answer/s
A

solute

B

solvent

C

solution

D

solid

E

ionic compound

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Question 6
Multiple Choice

Oil does not dissolve in water because ________ .

Choose correct answer/s
A
oil is polar
B
oil is nonpolar
C
water is nonpolar
D
water is saturated
E
oil is hydrated
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Question 7
Multiple Choice

When KCl dissolves in water ________ .

Choose correct answer/s
A
the image ions are attracted to dissolved image ions
B
the image ions are attracted to the partial negative charge on the oxygen atom of the water molecule
C
the image ions are attracted to image ions on the KCl crystal
D
the image ions are attracted to the partial negative charge on the oxygen atom of the water molecule
E
the image ions are attracted to the partial positive charge on the hydrogen atoms of the water molecule
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Question 8
Multiple Choice

Water is a polar solvent and hexane ( image image )is a nonpolar solvent.Which of the following correctly describes the solubility of the solute in the given solvent?

Choose correct answer/s
A
mineral oil,soluble in water
B
Ca image ,soluble in hexane
C
image ,soluble in water
D
image ,soluble in water
E
octane,soluble in water
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Question 9
Multiple Choice

In water,a substance that ionizes completely in solution is called a ________ .

Choose correct answer/s
A
weak electrolyte
B
nonelectrolyte
C
semiconductor
D
nonconductor
E
strong electrolyte
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Question 10
Multiple Choice

An equivalent is ________ .

Choose correct answer/s
A
the amount of ion that has a 1+ charge
B
the amount of ion that has a 1- charge
C
the amount of ion that carries 1 mole of electrical charge
D
1 mole of any ion
E
1 mole of an ionic compound
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Question 11
Multiple Choice

How many equivalents are in 0.60 mole of image ?

Choose correct answer/s
A
0.60 Eq
B
0.30 Eq
C
1.2 Eq
D
2.0 Eq
E
1.0 Eq
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Question 12
Multiple Choice

How many equivalents are in 0.40 mole of image ?

Choose correct answer/s
A
0.40 Eq
B
0.80 Eq
C
0.20 Eq
D
2.0 Eq
E
1.0 Eq
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Question 13
Multiple Choice

A solution contains 43 mEq/L of of image and 11 mEq/L of image .If the only cation in the solution is image ,what is the image concentration in mEq/L?

Choose correct answer/s
A
43 mEq/L
B
11 mEq/L
C
54 mEq/L
D
32 mEq/L
E
2.0 mEq/L
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Question 14
Multiple Choice

When some of the sugar added to iced tea remains undissolved at the bottom of the glass,the solution is ________ .

Choose correct answer/s
A
dilute
B
polar
C
nonpolar
D
saturated
E
unsaturated
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Question 15
Multiple Choice

The solubility of KI is 50 g in 100 g of image O at 20 °C.If 110 grams of KI are added to 200 grams of image O, ________ .

Choose correct answer/s
A
all of the KI will dissolve
B
the solution will freeze
C
the solution will start boiling
D
a saturated solution will form
E
the solution will be unsaturated
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Question 16
Multiple Choice

The compound KOH is ________ .

Choose correct answer/s
A
soluble,because all compounds containing image are soluble
B
insoluble,because all compounds containing image are in soluble
C
soluble,because all compounds containing image are soluble
D
insoluble,because all compounds containing image are insoluble
E
insoluble,because KOH is insoluble
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Question 17
Multiple Choice

An increase in the temperature of a solution usually ________ .

Choose correct answer/s
A
increases the boiling point
B
increases the solubility of a gas in the solution
C
increases the solubility of a solid solute in the solution
D
decreases the solubility of a solid solute in the solution
E
decreases the solubility of a liquid solute in the solution
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Question 18
Multiple Choice

According to Henry's law,the solubility of a gas in a liquid ________ .

Choose correct answer/s
A
decreases as the gas pressure above the liquid increases
B
increases as the gas pressure above the liquid increases
C
remains the same as the temperature increases
D
depends on the liquid polarity
E
depends on the liquid density
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Question 19
Multiple Choice

The mass percent concentration refers to ________ .

Choose correct answer/s
A
grams of solute in 1 kg of solvent
B
grams of solute in 1 kg of solution
C
grams of solute in 100 g of solvent
D
grams of solute in 100 g of solution
E
grams of solvent in 100 g of solution
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Question 20
Multiple Choice

What is the concentration,in mass percent (m/m),of a solution prepared from 50.0 g NaCl and 150.0 g of water?

Choose correct answer/s
A
0.250% (m/m)
B
33.3% (m/m)
C
40.0% (m/m)
D
25.0% (m/m)
E
3.00% (m/m)
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