AC-HPAT Chemistry Exam Questions With
Correct Answers
double-displacement reaction - CORRECT ANSWER✔✔-A double displacement | | | | | | |
reaction, also known as a double replacement reaction or metathesis, is a type of
| | | | | | | | | | | | | |
chemical reaction where two compounds react, and the positive ions (cation) and
| | | | | | | | | | |
the negative ions (anion) of the two reactants switch places, forming two new
| | | | | | | | | | | | | |
compounds or products | |
Precipitate - CORRECT ANSWER✔✔-precipitate is an insoluble solid that emerges
| | | | | | | | | |
from a liquid solution. The emergence of the insoluble solid from solution is
| | | | | | | | | | | | |
called precipitation. Often the precipitate emerges as a suspension. Precipitates
| | | | | | | | | |
can form when two soluble salts react in solution to form one or more insoluble
| | | | | | | | | | | | | | |
products.
Energy Levels - CORRECT ANSWER✔✔-Energy levels (also called electron shells)
| | | | | | | | | |
are fixed distances from the nucleus of an atom where electrons may be found.
| | | | | | | | | | | | | |
As you go farther from the nucleus, electrons at higher energy levels have more
| | | | | | | | | | | | | |
energy. Electrons in the outermost energy level of an atom are called valence
| | | | | | | | | | | | |
electrons
Marquis Test - CORRECT ANSWER✔✔-The Marquis Test is commonly used for
| | | | | | | | | | |
Ecstasy testing as MDMA turns the precipitate purple black. Cobalt thiocyanate is
| | | | | | | | | | | |
used to test for cocaine. The Cobalt is mixed with the questionable substance,
| | | | | | | | | | | | |
then drowned in hydrochloric acid, doused in chloroform, and shaken.
| | | | | | | | |
, What is the relation between an atomic number and a mass number? - CORRECT
| | | | | | | | | | | | | |
ANSWER✔✔-Atomic number is actually the number of protons in an atom while | | | | | | | | | | | |
mass number is the number of nucleons i. e, number of protons plus the number
| | | | | | | | | | | | | | |
of neutrons.
|
Isotopes - CORRECT ANSWER✔✔-Isotopes refer to the nuclides of a certain
| | | | | | | | | | |
element that have different numbers of neutrons, or in other words, atomic
| | | | | | | | | | | |
nuclei that have the same number of protons but different numbers of neutrons.
| | | | | | | | | | | | |
A radioisotope is an isotope that is unstable and therefore undergoes radioactive
| | | | | | | | | | | |
decay or will at some point.
| | | | |
Chemical Synthesis - CORRECT ANSWER✔✔-Chemical synthesis, the construction
| | | | | | | |
of complex chemical compounds from simpler ones. It is the process by which
| | | | | | | | | | | | |
many substances important to daily life are obtained. It is applied to all types of
| | | | | | | | | | | | | | |
chemical compounds, but most syntheses are of organic molecules.
| | | | | | | |
Decomposition - CORRECT ANSWER✔✔-A decomposition reaction is a type of | | | | | | | | | |
chemical reaction in which a single compound breaks down into two or more
| | | | | | | | | | | | |
elements or new compounds. These reactions often involve an energy source
| | | | | | | | | | |
such as heat, light, or electricity that breaks apart the bonds of compounds
| | | | | | | | | | | |
single-displacement reaction - CORRECT ANSWER✔✔-A single-displacement | | | | | |
reaction, also known as a single-replacement reaction, is a type of chemical
| | | | | | | | | | | |
reaction where an element reacts with a compound and takes the place of
| | | | | | | | | | | | |
another element in that compound. This type of reaction is typically pictured like
| | | | | | | | | | | | |
this: Here, A replaces B in the compound BC
| | | | | | | |
Flame test - CORRECT ANSWER✔✔-flame test is an analytical procedure used in
| | | | | | | | | | | |
chemistry to detect the presence of certain elements, primarily metal ions, based
| | | | | | | | | | |
Correct Answers
double-displacement reaction - CORRECT ANSWER✔✔-A double displacement | | | | | | |
reaction, also known as a double replacement reaction or metathesis, is a type of
| | | | | | | | | | | | | |
chemical reaction where two compounds react, and the positive ions (cation) and
| | | | | | | | | | |
the negative ions (anion) of the two reactants switch places, forming two new
| | | | | | | | | | | | | |
compounds or products | |
Precipitate - CORRECT ANSWER✔✔-precipitate is an insoluble solid that emerges
| | | | | | | | | |
from a liquid solution. The emergence of the insoluble solid from solution is
| | | | | | | | | | | | |
called precipitation. Often the precipitate emerges as a suspension. Precipitates
| | | | | | | | | |
can form when two soluble salts react in solution to form one or more insoluble
| | | | | | | | | | | | | | |
products.
Energy Levels - CORRECT ANSWER✔✔-Energy levels (also called electron shells)
| | | | | | | | | |
are fixed distances from the nucleus of an atom where electrons may be found.
| | | | | | | | | | | | | |
As you go farther from the nucleus, electrons at higher energy levels have more
| | | | | | | | | | | | | |
energy. Electrons in the outermost energy level of an atom are called valence
| | | | | | | | | | | | |
electrons
Marquis Test - CORRECT ANSWER✔✔-The Marquis Test is commonly used for
| | | | | | | | | | |
Ecstasy testing as MDMA turns the precipitate purple black. Cobalt thiocyanate is
| | | | | | | | | | | |
used to test for cocaine. The Cobalt is mixed with the questionable substance,
| | | | | | | | | | | | |
then drowned in hydrochloric acid, doused in chloroform, and shaken.
| | | | | | | | |
, What is the relation between an atomic number and a mass number? - CORRECT
| | | | | | | | | | | | | |
ANSWER✔✔-Atomic number is actually the number of protons in an atom while | | | | | | | | | | | |
mass number is the number of nucleons i. e, number of protons plus the number
| | | | | | | | | | | | | | |
of neutrons.
|
Isotopes - CORRECT ANSWER✔✔-Isotopes refer to the nuclides of a certain
| | | | | | | | | | |
element that have different numbers of neutrons, or in other words, atomic
| | | | | | | | | | | |
nuclei that have the same number of protons but different numbers of neutrons.
| | | | | | | | | | | | |
A radioisotope is an isotope that is unstable and therefore undergoes radioactive
| | | | | | | | | | | |
decay or will at some point.
| | | | |
Chemical Synthesis - CORRECT ANSWER✔✔-Chemical synthesis, the construction
| | | | | | | |
of complex chemical compounds from simpler ones. It is the process by which
| | | | | | | | | | | | |
many substances important to daily life are obtained. It is applied to all types of
| | | | | | | | | | | | | | |
chemical compounds, but most syntheses are of organic molecules.
| | | | | | | |
Decomposition - CORRECT ANSWER✔✔-A decomposition reaction is a type of | | | | | | | | | |
chemical reaction in which a single compound breaks down into two or more
| | | | | | | | | | | | |
elements or new compounds. These reactions often involve an energy source
| | | | | | | | | | |
such as heat, light, or electricity that breaks apart the bonds of compounds
| | | | | | | | | | | |
single-displacement reaction - CORRECT ANSWER✔✔-A single-displacement | | | | | |
reaction, also known as a single-replacement reaction, is a type of chemical
| | | | | | | | | | | |
reaction where an element reacts with a compound and takes the place of
| | | | | | | | | | | | |
another element in that compound. This type of reaction is typically pictured like
| | | | | | | | | | | | |
this: Here, A replaces B in the compound BC
| | | | | | | |
Flame test - CORRECT ANSWER✔✔-flame test is an analytical procedure used in
| | | | | | | | | | | |
chemistry to detect the presence of certain elements, primarily metal ions, based
| | | | | | | | | | |
