WorksheetsFinal Exam- The Last 30!
Total questions: 30
Worksheet time: 3600secs
Name
Class
Date
1.
Which of the following elements is a member of the halogen family and located in period 3
a)
argon (Ar)
b)
chlorine (Cl)
c)
bromine (Br)
d)
sulfur (S)
2.
In which of the following lists are the elements shown in order of increasing electronegativity?
a)
Li, Be, O, F
b)
O,F, Be,Li
c)
F, Li, O, Be
d)
Li, F, Be, O
3.
Which of the following statements explains why elements of the alkali metal family are highly reactive?
a)
Alkali metals are easily ionized.
b)
Alkali metals are negatively charged.
c)
Alkali metals have an odd number of protons.
d)
Alkali metals have an odd number of electrons.
4.
An element located at Group 18, Period 4 would be classified as which type of substance?
a)
a halogen
b)
a lanthanoid
c)
a metalloid
d)
a non metal
5.
Which of these elements is the most chemically reactive?
a)
zinc (Zn)
b)
potassium (K)
c)
iron (Fe)
d)
germanium (Ge)
6.
Which molecule represents an element?
a)
bromine gas (Br2)
b)
carbon dioxide (CO2)
c)
hydrogen fluoride (HF)
d)
sodium chloride (NaCl)
7.
Which chemical property places neon (Ne) and argon (Ar) in the same group?
a)
Both elements form ionic compounds.
b)
Both elements have a full outer energy level.
c)
Both elements have a low ionization energy.
d)
Both are liquids at 38 ⁰C.
8.
Sodium (Na) metal reacts violently with water to form hydrogen gas. Which element has a similar reaction when combined with water?
a)
gold (Au)
b)
lithium (Li)
c)
silicon (Si)
d)
zinc (Zn)
9.
Which equation shows that the total mass during a chemical reaction stays the same?
a)
1
b)
2
c)
3
d)
4
10.
__ NH3(g) + __ O2(g) --> ___N2(g) + ___ H2O (g)
When the reaction above is completely balanced, the coefficient for NH3 will be?
When the reaction above is completely balanced, the coefficient for NH3 will be?
a)
2
b)
3
c)
4
d)
6
11.
C3H8 + O2 --> CO2 + H2O
This chemical equation represents the combustion of propane. When correctly balanced, the coefficient for water is
This chemical equation represents the combustion of propane. When correctly balanced, the coefficient for water is
a)
2
b)
4
c)
8
d)
16
12.
In the reaction of solid zinc with hydrochloric acid (HCl), the products of hydrogen gas and aqueous zinc chloride are produced.
Which of these is the balanced equation from the reaction?
Which of these is the balanced equation from the reaction?
a)
Zn(s) + HCl(aq) --> ZnCl2 (aq) + H (g)
b)
2Zn(s) + 4HCl(aq) --> Zn2Cl4(aq) + H2(g)
c)
Zn2(s) + HCl(aq) --> 2ZnCl(aq) + H2(g)
d)
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
13.
A balanced chemical equation reflects the idea that the mass of the products
a)
is greater than the mass of the reactants.
b)
is less than the mass of the reactants.
c)
equals the mass of the reactants.
d)
is not related to the mass of the reactants.
14.
Which of the following is a characteristic of all chemical changes?
a)
a different state of matter is produced.
b)
Some mass is converted to energy.
c)
Some form of light is given off.
d)
A new material is formed.
15.
Copper in the compound CuSO4 can be isolated in the following reaction with iron.
Fe + CuSO4 -->FeSO4 + Cu
What type of reaction is shown above?
Fe + CuSO4 -->FeSO4 + Cu
What type of reaction is shown above?
a)
decomposition
b)
synthesis
c)
single displacement
d)
double displacement
16.
Which of the following represents a double displacement reaction?
a)
ABC-->AB + C
b)
A + B --> AB
c)
AB + CD --> AD + CB
d)
A + BC --> AC + B
17.
Which of the following chemical reactions is a decomposition reaction?
a)
BaCO3-->BaO + CO2
b)
2Ca + O2 --> 2CaO
c)
3Br2+2FeI3--> 2FeBr3 + 3I2
d)
MgCl2 + H2SO4 --> MgSO4 + 2HCl
18.
Which of the following statements describes all exothermic reactions?
a)
Exothermic reactions form gases.
b)
Exothermic reactions require a catalyst.
c)
The energy of the reactants is lower than the energy of the products.
d)
The energy of the reactants is higher than the energy of the products.
19.
When N2O5 is heated under certain conditions, O2 and NO2 are produced. What type of reaction is this?
a)
combustion
b)
decomposition
c)
double displacement
d)
synthesis
20.
A student dissolves 10.0 g of ammonium nitrate (NH4NO3) crystals in a calorimeter containing 100.0 g of water. The equation for the dissolution process is shown below.
NH4NO3 --> NH4+1(aq) + NO31(aq)
The student records the temperature of the solution every 5s. The table shows the collected data.
Which of the following conclusion about dissolving the crystals can be made based on the data?
a)
Dissolution added energy to the water, so the process is exothermic.
b)
Dissolution added energy to the water, so the process is endothermic.
c)
Dissolution absorbed energy from the water, so the process is exothermic.
d)
Dissolution absorbed energy from the water, so the process is endothermic.
21.
Which of these is an example of a physical change?
a)
melting ice
b)
baking a cake
c)
rusting metal
d)
burning leaves
22.
Which equation represents a double replacement reaction?
a)
2KClO3 --> 2KCl + 3O2
b)
CaBr2 + Na2CO3 --> CaCO3 + 2NaBr
c)
Zn + S --> ZnS
d)
2Li + FeBr2 --> 2LiBr + Fe
23.
Solutions of lead (II) nitrate and potassium dichromate are mixed. The solution turns cloudy and yellow. Solid yellow particles fall to the bottom of the beaker. Which statement best describes this reaction?
a)
A precipitate formed.
b)
A gas formed.
c)
The reaction is exothermic
d)
The reaction is endothermic.
24.
What type of chemical reaction is represented by this equation?
2Li (s) + 2H2O (l) --> 2LiOH (aq) + H2 (g)
2Li (s) + 2H2O (l) --> 2LiOH (aq) + H2 (g)
a)
decomposition
b)
double replacement
c)
single replacement
d)
synthesis
25.
Consider this reaction:
NH3 (g) + HCl(g) --> NH4Cl(s)
Which type of reaction does this represent?
NH3 (g) + HCl(g) --> NH4Cl(s)
Which type of reaction does this represent?
a)
combustion
b)
single replacement
c)
decomposition
d)
synthesis
26.
This balanced equation represents a chemical reaction.
2C4H10 (g) + 12O2 (g)--> 8CO2 (g) + 10H2O (g)
What type of chemical reaction is represented by the equation?
2C4H10 (g) + 12O2 (g)--> 8CO2 (g) + 10H2O (g)
What type of chemical reaction is represented by the equation?
a)
combustion
b)
decomposition
c)
double replacement
d)
single replacement
27.
When AgNO3 (aq) is mixed with NaCl (aq), which type of reaction will occur?
a)
single replacement
b)
synthesis
c)
decomposition
d)
double replacement
28.
Why does the rate of a chemical reaction increase when the surface area of a reactant is increased?
a)
When the surface area increases, the reaction temperature increases.
b)
When the surface area increases, the number of particle collisions increases.
c)
When the surface area increases, the concentration of the substance increases.
d)
When the surface area increases, the density of the substance increases.
29.
When a chemical cold pack is activated, it becomes cool to the touch. what is happening in terms of energy?
a)
An exothermic reaction is occurring, absorbing cold from its surroundings.
b)
An exothermic reaction is occurring, releasing heat to its surroundings.
c)
An endothermic reaction is occurring, releasing cold to its surroundings.
d)
An endothermic reaction is occurring absorbing heat from its surroundings.
30.
Which of the following statement best explains why ionic solids dissolve in water?
a)
Water has high surface tension.
b)
Water is a highly polar molecule.
c)
Water is more dense as a liquid than as a solid.
d)
Water has a higher boiling point than predicted by its molar mass.
100 %
