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WorksheetsChemistry 2nd semester final
Total questions: 30
Worksheet time: 27mins
Name
Class
Date
1.
The safest way to dilute concentrated sulfuric acid is to add –
a)
a series of small volumes of water to the acid while stirring
b)
dilute sulfuric to a small volume of concentrated acid
c)
the acid to water slowly while stirring constantly
d)
the acid to a small volume of water and then add more water
2.
Which of the following is the correct formula for hydrochloric acid?
a)
HClO4
b)
HClO3
c)
HCl
d)
HClO2
3.
Hydrochloric acid is added to a solution of sodium hydroxide to demonstrate a neutralization reaction. What would be the pH of this solution once it is completely neutralized?
a)
0
b)
7
c)
14
d)
10.5
4.
The formula H2SO4 is representative of which of the following?
a)
A catalyst
b)
A base
c)
An acid
d)
An organic compound
5.
Nitric acid is a stronger acid than hydrofluoric acid. Which of the following explains why nitric acid is considered the stronger acid?
a)
Hydrofluoric acid breaks apart when dissolved while nitric acid does not
b)
Nitric acid dissociates more completely into its ions in solution
c)
Hydrofluoric acid produces hydroxide ions instead of hydrogen ions
d)
The hydrogen ions in nitric acid are of a different hydrogen isotope
6.
If the number of moles of gas inside of a container increases, what will happen to the volume of the container if both temperature and pressure are kept constant?
a)
The volume will increase.
b)
The volume will decrease
c)
The volume will remain constant.
d)
None of the above.
7.
At which of the following temperatures would the motion of all of an objects particles come to a complete stop?
a)
0 K
b)
0oC
c)
373 K
d)
-100oC
8.
Which of the following is not a point made by the kinetic molecular theory of gases?
a)
Gases are composed of tiny particles.
b)
The speed of gas particles is related to the temperature of the system.
c)
Gas particles are always moving with high speed random motion.
d)
Gas particles do not have mass or take up any space.
9.
Charles’ Law states that if a given quantity of gas is held at a constant pressure, then its volume is directly proportional to the absolute temperature. This law explains why —
a)
the pressure of a gas increases when volume decreases
b)
a gas-filled balloon expands when it is heated
c)
solids require heat in order to change into gases
d)
some gases only react with each other at high temperatures
10.
A man who was sleeping wakes up because he hears the smoke alarm go off in his house. Before opening the bedroom door, the man feels the door to see whether it is warm. He is assuming that heat would be transferred through the door by –
a)
conduction
b)
convection
c)
radiation
d)
compression
11.
Which of these is the best example of heat transfer by radiation?
a)
A satellite is warmed by sunlight.
b)
Butter melts on warm bread.
c)
A ceiling fan cools a warm room.
d)
Puddles of water cool a warm tile floor
12.
To determine if a reaction is exothermic, a student should use a —
a)
pH probe
b)
motion sensor
c)
pressure sensor
d)
temperature probe
13.
Which chemical equation supports the law of conservation of mass?
a)
2H2O -> H2 + O2
b)
Zn + HCl -> ZnCl2 + H2
c)
Al4C3 + H2O -> CH4 + Al(OH)3
d)
CH4 + 2O2 -> CO2 + 2H2O
14.
___ PbO2 --> ___PbO + __O2
a)
2,1,1
b)
3,4,3
c)
2,2,1
d)
4,3,2
15.
Which of these would support the idea that mass is conserved in a reaction that produces a gas as a product?
a)
Heating the reactants to ensure the reaction occurs in a gaseous state
b)
Subtracting the mass of the gas from the mass of the solid and liquid products
c)
Mixing the reactants and measuring their total mass
d)
Trapping the gas and measuring its mass
16.
Pain medications can be made as powders or tablets. The powders tend to work faster than tablets with the same ingredients because powder –
a)
dissolves faster in solution than a single tablet
b)
has more total mass than a single tablet
c)
travels through the bloodstream more easily than a tablet
d)
is easier to swallow than tablets
17.
Power plants that discharge warm water into rivers have a negative effect on aquatic life. This is because the higher water temperature —
a)
increases the pressure of the river water
b)
increases the pH value of the river water
c)
decreases sediment solubility in the river water
d)
decreases the dissolved oxygen in the river water
18.
A solution which has a concentration that exceeds its predicted solubility at a certain temperature and pressure would be —
a)
unsaturated
b)
saturated
c)
supersaturated
d)
dilute
19.
a)
Battery acid
b)
Black coffee
c)
Baking soda
d)
Drain cleaner
20.
a)
decreases the pressure by 80 kPa _
b)
decreases the pressure by 160 kPa
c)
increases the pressure by 80 kPa
d)
increases the pressure by 160 kPa
21.
a)
The volume of a solvent affects the solubility of a solid solute.
b)
The volume of a solid solute affects its solubility.
c)
Increasing the temperature of a solution increases the solubility of a solid solute.
d)
Increasing the mass of a solid solute decreases its solubility.
22.
a)
solute
b)
solvent
c)
catalyst
d)
product
23.
a)
strong electrolyte
b)
weak acid
c)
nonelectrolyte
d)
strong base
24.
a)
expand
b)
lose velocity within the container
c)
become smaller
d)
collide more frequently with the container
25.
a)
Endothermic because energy was absorbed during the reaction
b)
Endothermic because energy was released during the reaction
c)
Exothermic because energy was absorbed during the reaction
d)
Exothermic because energy was released during the reaction
26.
a)
V -> W
b)
W -> X
c)
X -> Y
d)
Y -> Z
27.
An unknown solution must be handled with rubber gloves while wearing a lab apron. The product is clear, but it turns litmus paper red. It probably contains –
a)
an acid
b)
a base
c)
a neutral solution
28.
Water acts as a solvent of ionic compounds because —
a)
water is liquid over a wide range of temperatures
b)
water molecules are polar
c)
water takes the shape of its container
d)
water is found in three states of matter
29.
Bathwater normally has electrolytic behaviors even though distilled water does not. This is because bathwater -
a)
contains isotopes of hydrogen
b)
has been heated
c)
is separated into H+ and OH- ions
d)
contains dissolved minerals
30.
The ______________ yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting
a)
Percent
b)
actual
c)
stoichiometry
d)
theoretical
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