WorksheetsYear end final
Total questions: 100
Worksheet time: 50mins
Which of the following elements has the lowest electronegativity?
Lithium
Bromine
Carbon
Oxygen
what is the activation energy for the reverse reaction of the following:
35 kJ
25 kJ
40 kJ
15 kJ
The Bohr model of the atom is similar to
central ball with lighter balls connected
a basketball
plum pudding
solar system
Which of the following processes will give a negative value of ΔH?
H2O (s) → H2O(l)
H2O(l) → H2O (s)
CO2 (s) → CO2 (g)
NH3(l) → NH3 (g)
The tendency to gain electrons-------as you move down a column on the periodic table
remains the same
increases
decreases
increases, then decreases
What is the condensation point of the following substance?
92
30
120
58
The pressure of gas will----when the volume is decreased and will----when the absolute temperature is decreased.
decrease, increase
increase, decrease
increase, increase
decrease, decrease
Atoms of a covalent bond are held together by the attraction.....
between two nuclei
for 2 shared electrons
of protons and electrons
between two charged ions
The outer electron configuration of an alkali metal has
1 electron in the s orbital
2 electrons in the s orbital
1 electron in the p orbital
2 electrons in the p orbital
Which of the following is a weak electrolyte?
HClO4
HClO3
HClO2
NaOH
Trends in the periodic table indicate that the element with the greatest ionization energy is in which of the following period and group?
Period 7, group 2
Period 2, group 1
Period 6, group 17
Period 1, group 18
What is the hybridization on the carbon of the methane molecule?
sp
sp2
sp3
sp4
Which of the following reactions have a negative entropy change? I. 2H2 (g) + O2 (g)→2H2O(l)
II. 2NH3 (g) → N2(g) + 3H2(g)
III. Ca(s) + Cl2(g) → 2CaCl2(s)
I only
II only
I and III
II only
What phase change occurs if pressure is increased at point "y" in the diagram...
melting
freezing
condensation
vaporization
What is the value of the self ionization constant of water?
55.4
1.00 x 10-14
14
1.00 x 10-7
What is the electron configuration of the Fluoride ion?
1s2 2s2 2p6 3s2
1s2 2s2 2p6
1s2 2s2 2p6 3s2 3p6 3d10 4s2
1s2 2s2 2p6 3s2 3p5
The true volume of a real gas is smaller than that calculated from the ideal gas law equation under low temperatures. This occurs because the ideal gas equation does NOT correct for:
the finite volume of molecules
the mass of molecules
the attraction between molecules
the shape of molecules
A very high value of the equilibrium constant for a reaction indicates that
equilibrium has been reached
reactants are favored
products are favored
equilibrium has shifted
What subatomic particle determines the identity of an element?
neutrons
protons and quarks
protons
electrons
What type of bond would you expect between an iron and an oxygen atom?
covalent
reactive
metallic
ionic
What is the concentration of OH- ions in pure water?
1.00 x 10-14 M
zero
1.00 x 10-7 M
8.00 M
Which liquid has the lowest vapor pressure?
Na2CO3
K2O
CaCO3
Al2(CO3)2
What is the formula for Lead (II) chromate?
PbCO4
PbCrO
PbCrO4
PbCrO7
Why did J.J. Thomson reason that electrons must be a part of the atoms of all elements?
Cathode rays are negative
an electron is very small, so it must be everywhere
cathode rays can be deflected by magnets
the charge/mass ratio was the same regardless of gas used
Which of the following is not a property of an ionic compound:
low boiling point
electrolytes
formed by ions
hard
A mole is 6.02 x 1023 atoms of ------ grams of -------isotope
1 g, H-1
18g, H2O
12 g, C-12
16 g, O-16
When an electrons moves from a lower to a higher energy level, energy is
released
absorbed
created
changed
If the temperature of the equilibrium system: X + Y ↔ XY + 25 kJ, decreases....
[X] decreases and [XY] decreased
concentrations will stay the same
[X] increases and [XY] decreases
[X] decreases and [XY] increases
The lines in the emission spectrum of hydrogen result from------
protons given off when hydrogen burns
electrons given off when hydrogen burns
energy given off when hydrogen burns
decomposing hydrogen atoms
In a horizontal row, the ionization energy tends to ----- with increasing atomic number
remain the same
increase
decrease
increase, then decrease
Which of the following elements has the smallest first ionization energy?
Potassium
calcium
magnesium
sodium
What is the bond angle in a water molecule?
180
120
104.5
109.5
The molecualr gemoetry of PF3 molecule is ----- and this molecule is -----
trigonal planar, nonpolar
trigonal planar, polar
trigonal pyramid, polar
trigonal pyramid, nonpolar
What is the formula for a compound formed by thyocyanate?
BaSCN
BaCN
Ba(SCN)2
Ba(CN)2
The least reactive elements are those of the
metals
transition elements
nonmetals
noble gases
Name the compound: Ni(ClO3)2
nickle chlorite
nickle chlorate
nickle (II) chlorate
nickle (I) chlorate
The molecular geometry of BF3 molecule is---- and this molecule is -----.
trigonal planar, polar
trigonal planar, nonpolar
trigonal pyramid, polar
trigonal pyramid, nonpolar
What is the pH of a 1 x 10-4 M HCl solution?
11
1
4
10
Which of the following substance has the lowest boiling point?
PH3
NH3
H2S
CH4
Name the compound: Fe(NO2)2
Iron nitrate
Iron nitrite
Iron (I) nitrate
Iron (II) nitrite
What is true of isotopes? They have the....
same nucleous but different electorn cloud
same number of protons but different number of neutrons
same number of neutrons but differnet number of electrons
same number of protons but different number of electrons
Which of the following is an example of a network covalent solid?
CaCO3
NaCl
Sugar
SiO2
if the pressure on the reaction N2(g) + O2(g) ↔ 2NO(g) at eqiulibrium is increased,
The quantities of all substances do not change
the quantity of NO decreases.
teh quantity of N2 decreases
the quantity of NO increases
name the compound Zn3(PO4)2
Zinc (III) phosphate
Zinc phosphate
Zinc (II) phosphate
Zinc phospide
How many neutrons are present in the isotope: 26X12
12
26
38
14
How does atomic radius change form top to bottom in a group in the periodic table?
it increases
it decreases
it increases then decreases
it decreases, then increases
The products of a combustion reaction do NOT include-----
water
carbon dioxide
hydrogen
carbon monoxide
Teh products of neutralization reaction include-----
salt and sugar
salt and water
acid and base
acid and salt
For the alkaline-earth metals, atoms with the smallest radii have the
largest volumes
largest atomic number
highest ionization energy
most mass
In a double bond, two atoms share a total of ----- electrons.
six
two
four
three
Which of the following isotopes has the same number of neutrons as Phosphorous-31
Sulfur-32
Phosphorous-32
Silicon-28
Silicon-29
A solution whose pH is 4
is always basic
is always acidic
is always neutral
might be neutral or acidic
A conjugate base is the species that
is formed by the addition of a proton to a base
remains after an acid has given up a proton
is formed by the addition of a proton
remains after a base has given up a proton
A dissolved solute that does NOT form ions is
a strong electrolyte
a weak electrolyte
a nonelectrolyte
insoluble
In a an acid-base titration, equivalent quantities of hydronium ions and hydroxide ions are present
at the equivalence point
at the end point
at the midpoint
at the beginning
What is the change in enthalpy for the reaction....
1
2
3
4
The hybridization around the SF6 molecule is ----- and the molecule is -----.
sp2, polar
sp3d, polar
sp3d, nonpolar
sp3d2, nonpolar
What type of bond would you expect between two chlorine atoms?
metallic
nonmetallic
ionic
Covalent
ionic compounds are brittle because the strong attractive forces...
keep the surface dull
allow the layers to shift easily
cause the compound to vaporize easily
hold the layers in fixed positions
If teh system 2CO(g) + O2(g) ↔ 2CO2(g) has come to equilibrium and then more CO2 is added,
both [CO] and [O2] increase
[CO] increases and [O2] decreases
[CO] decreases and [O2] increases
both [CO] and [O] decreases
Which of the following processes is endothermic?
CO2(g) → CO2(s)
H2O(g) → H2O (l)
H2O(l) → H2O (s)
NH3(l) → NH3(g)
What is the freezing point of the following substance?
30
58
92
120
Which of the following is soluble in water?
NH3
CF4
C6H6
BH3
The letter "p" in teh symbol 4p3 indicates the ----
speed of electron
orbital shape
spin of electron
energy level
Electronegativity------------as you go right across a row
increases
decreases
remain the same
increase, then decreases
Which of these intermolecular forces accounts for the nonpolar parafin wax existing as a solid at room temperature?
hydrogen bonding
Dispersion forces
dipole-dipole
ion-dipole
Which of the following is capable of hydrogen bonding?
methane
ammonia
salt
diamond
The correct Lewis structure for a fluorine atom in a molecule of F2 shows
one shared pair of electrons
two shared pair od electrons
no shared apir of electrons
three shared pairs of electrons
consider the reaction: N2(g) + 3H2(g) ↔ 2NH3 (g). what is the effect of decreasing the volume on the reaction?
The equilibrium shifts right
The equilibrium shifts left
The equilibrium does not shift
The equilibrium is terminated
Of the compounds below, only---- is NOT an electrolyte.
MgO
H2O
HCl
NaOH
What is the formula for aluminum sulfate?
AlS3
AlSO3
Al2(SO4)3
AlSO4
Which diagram in the picture, shows the appropriate catalyst in a chemical reaction?
A
B
C
D
The molecular geometry of the left-most Carbon in the molecule is...
trigonal pyramid
trigonal planar
tetrahedral
linear
A solution with a pH of 10 is
Always acidic
Always Basic
Always neutral
might be acidic, basic or neutral
Arrange the following gases in order of increasing average molecular speed at 25oC. Cl2, O2, F2, N2
F2 < O2 < N2< Cl2
Cl2< F2 < O2 < N2
Cl2 < F2 < N2 < O2
N2 < F2 < Cl2 < O2
What is the pH of a 1 x 10-5 M NaOH solution?
5
9
3
11
Why does H2O have a higher boiling point than SeH2
SeH2 has hydogen bonding and H2O does not
H2O has hydrogen bonding and SeH2 does not
H2O is bend and SeH2 is not
SeH2 is bent and H2O is not
Which is true for the following reaction? A+ B → C+ D ΔH=+557kJ
it is endothermic
it is exothermic
it is releasing heat
it is releasing entropy
The pH of a solution is 9 What is the H3O+ concentration?
9 M
5 M
1 x 10-9 M
1 x 10-5 M
Decreasing the temperature of an ideal gas from 80 K to 40 K causes the average kinetic energy to
decrease by a factor of two
increase by a factor of two
increase by a factor of four
decrease by a factor of 4
The chart below shows the relationship between ionization energy and atomic number. The letter on the chart for the noble gases is
Z
Y
X
W
In the diagram below, which labeled arrow is pointing toward a hydrogen bond?
4
2
1
3
Which of the following is an example of a covalent network solid?
Diamond
SF6
CO2
C2H2
Once an atom has full s and p orbitals in its outermost energy level,
it has a stable octet and is unreactive
it is highly reactive
it is slighlty reactive
it can be combined easily
The greater the kinetic energy of the particles in a sample of matter,
the higher the temperature
the lower the temperature
the less heat flows away from the sample
the more heat flows into the sample
A molecule is a group of
protons and neutrons
protons and electrons
covalently bonded atoms
ionically bonded atoms
An anion has
more protons than electrons
more electrons than neutrons
more electrons than protons
more neutrons than protons
Which of the following substances has the lowest boiling point?
HF
Cu
Cl2
MgCl2
the pH of a solution is 10. What is the OH- concentration?
10 M
4 M
1 x 10-4 M
1 x 10-10 M
How many significant figures are in 1,000.0?
1
2
5
4
Which group of teh periodic table do F and Cl belong to?
actinides
alkaline metals
halogens
chalcogens
The diagram below represents which type of reaction?
decomposition
precipitation
combustion
acid/base
For an exothermic reaction, the products
are at a lower energy level than the products
are at a higher energy level than the reactants
have no energy
are at the same energy level than the reactants
Ethanol C2H5OH will dissolve....
SF6
NH3
CCl4
CH4
Water has a high surface tension due to....
strong dipole-dipole interactions
weak dipole-dipole interactions
strong hydrogen bond interactions
weak hydrogen bond interactions
How are frequency and wavelength related?
they are directly proportional to each other
they are indirectly proportional to each other
they are not related to each other
frequency and wavelength are the same
Which liquid will have the lowest freezing point?
0.3M Na3PO4
0.6 M C6H12O6
0.3 M NaCl
0.9 M C12H22O11
A very low value of the equilibrium constant for a reaction can indicate that...
reactants are favored
products are favored
equilibrium is reached slowly
equilibrium has been reached
At high pressures, how does the volume of a real gas compare with the volume of an ideal gas under the same conditions?
It depends on the gas
it is less
it is greater
it is the same
As you move from left to right across the second period of teh periodic table----
atomic radius increases
ionization energy increases
electronegativity decreases
atomic mass decreases
