Chemistry is an experimental science, however, much of its progress has been due to
application of the scientific method through systematic research. There are four steps
used as a broad outline of the general procedure that is followed in most scientific
work.
1 point
TRUE
FALSE
Which of the following liquid will occupy more volume?
1 point
Water
Soda
Ethyl Alcohol
Both Water and Soda
Driving to the grocery store you notice the temperature is 45 degree Celcius.
Determine what this temperature is on the Fahrenheit scale?
1 point
113 degree Fahrenheit
236 degree Fahrenheit
364 degree Fahrenheit
115 degree Fahrenheit
Identify the type of pipette presented below:
1 point
Ostwald-folin
Mohr pipette
Pasteur pipette
Volumetric pipette
[1] When items are expressed in exact whole number this are considered measured
numbers. [2] Defined relations also involve exact whole number but are NOT ALWAYS
exact whole numbers.
1 point
Only first statement is correct.
Only second statement is correct.
Both statements are correct.
Both statements are incorrect.
Changing the number of neutrons of an atom changes its ___________?
1 point
Isotope
Charge
Ion
Proton
Electron
Blowing gently across the surface of a cup of hot coffee help to cool it and inserting a
spoon into the coffee do the same thing. Which of the following statements DO NOT
support the situation.
2 points
As you blow, you move the warmed air molecules away from the surface then replacing it with
cooler ones, which are warmed by the coffee and cool it in a repeating cycle.
The heat from the coffee is directly proportional to the heat absorbing by the spoon. Thus, heat is
maintained at constant scale.
Heat is transferred from the molecules of water on the surface to the air above them.
Inserting a spoon into hot coffee cools the coffee by heat transfer as well. Heat is transferred from
the coffee to the spoon, lowering the temperature of the coffee and raising the temperature of the
spoon.
Which of the following elements has the highest percentage in the human anatomic
body?
1 point
Magnessium
Sodium
Calcium
Nitrogen
[1] Valency is an atom or group of atoms' ability to chemically unite with other atoms
or groups. [2] When an electron absorbs energy in the form of one or more photons,
then it moves to a more outer shell depending on the amount of energy gained. When
an electron gained photon it moves to inner shell. The innermost main energy level of
an atom is also called valence shell.
1 point
Only the first statement is correct
Only the second statement is correct
Both statements are correct
Both statements are incorrect
All of the following elements are examples METALLOIDS except:
1 point
Si
As
Te
Se
Element is determined by the number of ___________?
1 point
Proton
Electron
Nuetron
All of the above
The total number of the electrons and protons in the nucleus is called the mass
number (also referred as the atomic weight).
1 point
True
False
Identify what type of reaction happened on this equation: C5H9O + O2 ---> CO2 +
H2O
2 points
Single Displacement Reaction
Double Displacement Reaction
REDOX Reaction
Matethesis Reaction
Neutralization Reaction
Rubbing your hands together.
1 point
Potential Energy
Kinetic Energy
Both
[1] The Spin Projection Quantum Number describes the energy levels available within
a sub shell and yields the projection of the orbital angular momentum along a
specified axis. This describes the orbital’s orientation in space. [2] The angular or
orbital quantum number, describes the sub shell and gives the magnitude of the orbital
angular momentum through the relation. In chemistry, this quantum number is very
important since it specifies and describes the shape of an atomic orbital and strongly
influences chemical bonds and bond angles.
1 point
Only the first statement is correct
Only the second statement is correct
Both statements are correct
Both statements are incorrect
[1] Eating and drinking in the laboratory is allowed as long as the hands are washed
before doing so. [2] Chemicals must be discarded in the sink after performing
laboratory procedures in order to keep the working area clean before leaving the
laboratory.
1 point
Only first statement is correct.
Only second statement is correct.
Both statements are correct.
Both statements are incorrect.
Wolfram is the former name of:
1 point
Tin
Tungsten
Silver
Gold
Convert 36.6 inches into centimeter.
1 point
92cm
93cm
94cm
95cm
[1] The theory of Aristotle dominated the thinking of scientists and philosophers until
the beginning of the seventeenth century. [2] Plato thought that all forms of matter
were composed of tiny indivisible particles.
1 point
Only first statement is correct.
Only second statement is correct.
Both statements are correct.
Both statements are incorrect.
Running water
1 point
Potential Energy
Kinetic Energy
Both
How many significant figures are there in 0.612400?
1 point
4 significant figures
5 significant figures
6 significant figures
7 significant figures
He explained the emission spectra of some elements.
1 point
Erwin Schrodinger
Neils Bohr
Dmitri Mendeleev
John Dalton
A leaf turning yellow.
1 point
Physical Change
Chemical Change
Both
[1] There are four main scales commonly used in the world today to measure
temperature. [2] The standard unit in the metric system of length is meter (m).
1 point
Only first statement is correct.
Only second statement is correct.
Both statements are correct.
Both statements are incorect.
Which of the following statements about chemical reaction is NOT true:
1 point
Decomposition reaction is considered as the opposite of direct combination reaction.
The H+ ion in the acid reacts with the OH- in the base to breakdown water molecules and form
ionic salt.
During hydrolysis, it adds water to break down, whereas condensation builds up by removing
water and any other solvents.
Metathesis happens when two compounds exchange bonds or ions in order to form different
compounds.
A substance that can chemically react as either acid or base.
1 point
Buffer
Salts
Amphoteric solutions
Anhydride
[1] Electron affinity increases from left to right within a period. This is caused by the
decrease in atomic radius. [2] Electron affinity decreases from top to bottom within a
group. This is caused by the increase in atomic radius.
1 point
Only first statement is correct.
Only second statement is correct.
Both statements are correct.
Both statements are incorect.
[1] During balancing equations do not add subscripts, because this will change the
formulas. [2] The balanced equation don't generally require to obey the law of
conservation of mass.
1 point
Only the first statement is correct
Only the second statement is correct
Both statements are correct
Both statements are incorrect
[1] Acids make a blue vegetable dye called LITMUS turn red. [2] Bases will restore the
original red color of litmus.
1 point
Only the first statement is correct
Only the second statement is correct
Both statements are correct
Both statements are incorrect
[1] All acids and bases and salts are grouped together into category called
electrolytes, meaning that a water solution of the given substance will conduct an
electric current. [2] Cations are the negatively charged ions.
1 point
Only the first statement is correct
Only the second statement is correct.
Both statements are correct.
Both statements are incorrect.
The amount of space occupied by matter is known as _______?
1 point
Mass
Density
Volume
Weight
Length
Who developed the original Periodic Table?
1 point
Gregor Mendel
Dimitri Mendeleev
Hippocrates
Aristotle
Runners poised at the starting line.
1 point
Potential Energy
Kinetic Energy
Both
The volume of blood plasma in adults is 3.1 L. Its density is 1.03 g per cubic
centimeter. Approximately how many pounds of blood plasma are there in the human
body?
1 point
7.0 lb
70.0 lb
6.0 lb
60.0 lb
This refers to the compounds that assimilate H2O to form either an acid or base upon
addition of water.
1 point
Amphoteric
Anhydride
Oxide
Compounds
It is characterized by one element reacts with a compound to replace one of the
elements of that compound, yielding a different element and a different compound.
1 point
Metathesis Reaction
Redox Reaction
Substitution Reaction
Synthesis Reaction
Orbitals of equal energy are each occupied by one electron before any orbital is
occupied by a second electron, and all electrons in singly occupied by a second
electron, and all electrons in singly occupied orbitals must have the same spin.
1 point
Aufbau Principle
Hund's Rule
Octet
Noble Gas Configuration
[1] The elements Copper and Bismuth exist as diatomic molecules (they contain
exactly 2 atoms) [2] The elements can be presented in nature as solid, liquid or gas.
1 point
Only the first statement is correct
Only the second statement is correct
Both statements are correct
Both statements are incorrect
What is the distinctive element that proteins have compared to carbohydrates and
lipids?
1 point
Carbon
Hydrogen
Oxygen
Nitrogen
[1] All acids and bases except salts are grouped together into category called
electrolytes, meaning that a water solution of the given substance will conduct an
electric current. [2] Ion is the smallest uncharged individual unit of a compound formed
by the union of two or more atoms.
1 point
Only the first statement is correct
Only the second statement is correct.
Both statements are correct.
Both statements are incorrect.
[1] Electrons are distributed in the main energy level, each energy level possesses a
certain sub shell or sub level (the sub shell composed of one or more orbitals which
the electrons occupy). [2] One orbital contains maximum of four electrons.
1 point
Only first statement is correct
Only second statement is correct
Both statements are correct
Both statements are incorrect
[1] Alchemy developed extensively during the Middle Ages cultivated largely by
itenerant scholars. [2] The first chemical treatises to become well known in Europe
were Latin translations of Arabic works made in Spain
1 point
Only first statement is correct.
Only second statement is correct.
Both statements are correct.
Both statements are incorrect.
Which is the higher temperature, 4.5 degree Fahrenheit or -15 degree Celcius?
1 point
-15C > 4.5F
-15C < 4.5F
-15C = 4.5F
None of the choices because they have different unit of measurement.
[1] The electrons are held in an atom or ion by electrostatic attraction between the
positively charged nucleus and the negatively charged electrons. [2] The amount of
negative charge that actually acts on an electron is called the effective nuclear charge.
1 point
Only first statement is correct.
Only second statement is correct.
Both statements are correct.
Both statements are incorrect.
All of the following elements are examples of NON-METALS except:
1 point
H
Kr
Mo
Xe
[1] Gas particles cohere firmly but not rigidly. [2] Solid particles cohere rigidly to one
another.
1 point
Only first statement is correct.
Only second statement is correct.
Both statements are correct.
Both statements are incorect.
[1] In a chemical reaction atoms are only created but not destroyed. All atoms that are
present in the reactants must also be present in the products. [2] During reactions
chemical bonds are broken and new bonds are formed.
1 point
Only first statement is correct
Only second statement is correct
Both statements are correct
Both statements are incorrect
It is the ability of an atom in a molecule to draw electrons to itself.
1 point
Ionization
Affinity
Electronegativity
Atomic Radius
