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General Chemistry MCQ

What is the definition of active transport?

The movement of molecules or ions from a region of lower concentration to higher concentration; does not require energy

The movement of molecules or ions from a region of lower concentration to higher concentration; requires energy

The movement of molecules or ions from a region of higher concentration to lower concentration; does not require energy

The movement of molecules or ions from a region of higher concentration to lower concentration; requires energy

Answer

Correct Answer: The movement of molecules or ions from a region of lower concentration to higher concentration; requires energy

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What is the minimum amount of energy needed for a chemical reaction to occur?

Activation energy

Energy

Potential energy

Kinetic energy

Answer

Correct Answer: Activation energy

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What is the maximum energy point in a chemical reaction called?

Activated complex

Substrates

Reactants

Products

Answer

Correct Answer: Activated complex

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What is the name for the element with atomic number 89?

Argon

Helium

Neon

Actinium

Answer

Correct Answer: Actinium

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Which group does Actinium belong to?

Halogen

Alkali Metal

Noble Gas

Actinide

Answer

Correct Answer: Actinide

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How many actinide elements are there?

Answer

Correct Answer: 14

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According to the common properties, which element is NOT an actinide?

Thorium

Americium

Uranium

Plutonium

Answer

Correct Answer: Thorium

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What is an acidic solution?

An aqueous solution with a pH more than 7.0

An aqueous solution with a pH less than 7.0

An aqueous solution with a pH of 7.0

A non-aqueous solution

Answer

Correct Answer: An aqueous solution with a pH less than 7.0

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What is the acid dissociation constant?

A qualitative measure of how strong an acid is.

The number of moles of H+ ions in one liter of a 0.1 molar solution of acetic acid.

A quantitative measure of how strong an acid is.

Answer

Correct Answer: A quantitative measure of how strong an acid is.

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What is the purpose of acid-base titration?

To find the density of a substance.

To find the concentration of an acid or base.

To find the boiling point of a substance.

To find the melting point of a substance.

Answer

Correct Answer: To find the concentration of an acid or base.

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What is the equivalence point in an acid-base titration?

The point at which the reaction stops

The point at which the reaction starts

The point at which the concentrations of the acid and base are equal

The point at which the pH is 7

Answer

Correct Answer: The point at which the concentrations of the acid and base are equal

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Indicators that change color when the concentration of hydrogen or hydroxide ions changes in an aqueous solution are called what?

PH indicators

Basic indicators

Acid-base indicators

Acidic indicators

Answer

Correct Answer: Acid-base indicators

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What is an acid anhydride?

A base

A corrosive substance

A nonmetal oxide that reacts with water to form an acidic solution.

A metal oxide

Answer

Correct Answer: A nonmetal oxide that reacts with water to form an acidic solution.

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What does accuracy refer to in measurement?

The degree of exactness of a measurement.

The degree to which a measure conforms to a standard or accepted value.

The closeness of a measurement to a true or accepted value.

The number of significant digits to which a value has been measured.

Answer

Correct Answer: The closeness of a measurement to a true or accepted value.

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What does the term 'absorptivity' mean?

The absorbance of a solution per unit path length

The absorbance of a solution per unit distance

Absorption cross section of extinction coefficient

The absorbance of a solution per unit concentration

Answer

Correct Answer: Absorption cross section of extinction coefficient

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What is the absorbance of a solution per unit path length and concentration?

Absorptivity

Absorbance

Molar absorptivity

Extinction coefficient

Answer

Correct Answer: Absorbance

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What does an absorption spectrum show?

The amount of emission as a function of wavelength.

The amount of refraction as a function of wavelength.

The amount of absorption as a function of wavelength.

The amount of reflection as a function of wavelength.

Answer

Correct Answer: The amount of absorption as a function of wavelength.

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What is the absorption spectrum?

Graph of amount of emission as a function of wavelength.

Graph of amount of refraction as a function of wavelength.

Graph of amount of reflection as a function of wavelength.

Graph of amount of absorption as a function of wavelength.

Answer

Correct Answer: Graph of amount of absorption as a function of wavelength.

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What is the technique used to determine concentration and structure of a sample based on which wavelengths of liquid are absorbed?

Reflection spectroscopy

Absorption spectroscopy

Scattering spectroscopy

Emission spectroscopy

Answer

Correct Answer: Absorption spectroscopy

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What is the process by which atoms, ions, or molecules enter a bulk phase?

Absorption

Evaporation

Condensation

Combustion

Answer

Correct Answer: Absorption

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What is the temperature of absolute zero?

0°C

-273.16°C

0 K or -273.15°C

1 K

Answer

Correct Answer: 0 K or -273.15°C

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What is absolute zero?

A state of complete disorder

The highest possible state at which matter can exist, 0 K or 273.15°C

The lowest possible state at which matter can exist, 0 K or -273.15°C.

A measure of coldness

Answer

Correct Answer: The lowest possible state at which matter can exist, 0 K or -273.15°C.

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What type of uncertainty is this?

Structural risk

Business risk

Relative uncertainty

Absolute uncertainty

Answer

Correct Answer: Absolute uncertainty

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What is absolute uncertainty?

The uncertainty of a scientific measurement, given in the same units as the measurement.

The uncertainty of a scientific measurement, given in different units as the measurement.

The certainty of a scientific measurement, given in the same units as the measurement.

The certainty of a scientific measurement, given in different units as the measurement.

Answer

Correct Answer: The uncertainty of a scientific measurement, given in the same units as the measurement.

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What is the name of the unit used to measure absolute temperature?

Celsius

Fahrenheit

Rankine

Kelvin

Answer

Correct Answer: Kelvin

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What is absolute error?

The difference between two measurements

Expression of the uncertainty or inaccuracy of a measurement

Highest possible error in a measurement

The average of several measurements

Answer

Correct Answer: Expression of the uncertainty or inaccuracy of a measurement

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What is the common name for high purity ethanol or ethyl alcohol?

Rubbing alcohol

Absolute alcohol

Isopropyl alcohol

Wood alcohol

Answer

Correct Answer: Absolute alcohol

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What is the axial direction?

One of two directions pointing from the center of a trigonal bipyramid along its axis

A line connecting any two non-adjacent vertices of a cube

The direction aligned with the axis of revolution of a three-dimensional object

A line segment joining the midpoints of the opposite sides of a square

Answer

Correct Answer: One of two directions pointing from the center of a trigonal bipyramid along its axis

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What is the value of Avogadro's law equation when the temperature is 0 degrees celsius and the pressure is 1 atm?

Vm = 11.2

Vm = 33.6

Vm = 44.8

Vm = 22.4

Answer

Correct Answer: Vm = 22.4

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What does Avogadro's law equation state?

V1/T1 = V2/T2

Vm = m/M

V = nRT/P

Vm = specific constant (depending on T, P; independent of gas)

Answer

Correct Answer: Vm = specific constant (depending on T, P; independent of gas)

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What is Avogadro's number?

6.02 x 1023

5 x 10^-3

6.023 x 10^23

3.01 x 10^-23

Answer

Correct Answer: 6.02 x 1023

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What is Avogadro's law?

The average kinetic energy of gas molecules is proportional to the absolute temperature of the gas.

Equal volumes of any two gases at the same temperature and pressure contain the same number of molecules.

Atoms and molecules are in constant motion.

The pressure-volume product is constant for a given mass of gas at a constant temperature.

Answer

Correct Answer: Equal volumes of any two gases at the same temperature and pressure contain the same number of molecules.

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What is atomic theory?

An explanation of the structure of matter in terms of different combinations of very small particles (atoms)

A theory that states that atoms are indivisible and indestructible

A theory that states that atoms are the smallest and most basic units of matter

A theory that states that atoms are the only form of matter

Answer

Correct Answer: An explanation of the structure of matter in terms of different combinations of very small particles (atoms)

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What is the symbol for a newly discovered element?

The atomic symbol is a three letter notation

A temporary name with a three letter notation

The atomic symbol is one- or two-letters

There is no atomic symbol for a newly discovered element

Answer

Correct Answer: A temporary name with a three letter notation

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What is the atomic symbol for the element sodium?

Answer

Correct Answer: Na

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What is an atomic orbital?

A quantum number for an electron in an atom

A wave function for an electron in an atom

A wave equation for an electron in an atom

A function for an electron in a molecule

Answer

Correct Answer: A wave function for an electron in an atom

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The number of protons in the nucleus of an atom is called what?

Atomic weight

Atomic number

Atomic radius

Atomic symbol

Answer

Correct Answer: Atomic number

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What is the atomic number of carbon?

Answer

Correct Answer: 6

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What is the atomic mass unit?

A measure of the strength of the individual bonds between atoms in a molecule

The sum of the number of protons and neutrons in an atom's nucleus

A unit of measurement for length

A mass unit equal to exactly one-twelfth the mass of a carbon-12 atom

Answer

Correct Answer: A mass unit equal to exactly one-twelfth the mass of a carbon-12 atom

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What is the value of an atomic mass unit?

1/11 the mass of a carbon-12 atom

The mass of a carbon-12 atom

1/12 the mass of a carbon-12 atom

1/13 the mass of a carbon-12 atom

Answer

Correct Answer: 1/12 the mass of a carbon-12 atom

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What does the atomic mass of an element express?

The mass of an individual atom

The number of protons in the nucleus

The average atomic mass for the naturally occurring element, expressed in atomic mass units

The atomic number of the element

Answer

Correct Answer: The average atomic mass for the naturally occurring element, expressed in atomic mass units

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What does the atomic mass of an element represent?

The atomic number of the element.

The average atomic mass for the naturally occurring element, expressed in atomic mass units.

The total number of protons in the nucleus.

The mass of an individual atom.

Answer

Correct Answer: The average atomic mass for the naturally occurring element, expressed in atomic mass units.

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What is an atom?

A measure of the amount of space that an object occupies.

The smallest particle of an element that has the chemical properties of that element.

An extremely small particle of matter that retains its identity during chemical reactions.

The basic unit of matter.

Answer

Correct Answer: An extremely small particle of matter that retains its identity during chemical reactions.

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What is a colloid in which the dispersed phase consists of micelles called?

Association colloid

Suspension

Homogeneous mixture

Heterogeneous mixture

Answer

Correct Answer: Association colloid

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What is the Arrhenius equation?

K = A + Ea/RT

K = Ae + Ea/RT

K = Ae-Ea/RT

K = Ae-Ea/TR

Answer

Correct Answer: K = Ae-Ea/RT

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What is an aromatic hydrocarbon?

A hydrocarbon that does not contain a benzene ring

A hydrocarbon that contains a benzene ring or similar structural feature

A compound that contains both an nitrogen and chlorine atom

A molecule made up of two or more atoms of hydrogen

Answer

Correct Answer: A hydrocarbon that contains a benzene ring or similar structural feature

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What are antibonding orbitals?

Orbitals having maximum values in the region between two nuclei

Orbitals having minimum values in the region between two nuclei

Orbitals having zero values in the region between two nuclei

Orbitals having zero values in all regions

Answer

Correct Answer: Orbitals having zero values in the region between two nuclei

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What is the anode?

The positively charged electrode.

The negatively charged electrode.

The electrode at which reduction occurs.

The electrode at which oxidation occurs.

Answer

Correct Answer: The electrode at which oxidation occurs.

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What is an anion?

A molecule

A cation

An atom

A negatively charged ion

Answer

Correct Answer: A negatively charged ion

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What is the quantum number that distinguishes orbitals of given n having different shapes?

Principal quantum number (n)

Secondary quantum number (m₂)

Magnetic quantum number (m₁)

Angular momentum quantum number (l)

Answer

Correct Answer: Angular momentum quantum number (l)

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What is the maximum value that the angular momentum quantum number can have?

N - 1

2n - 1

N/2

N + 1

Answer

Correct Answer: N - 1

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What is an amphoteric oxide?

A non-metal oxide

An oxide that only has acidic properties

An oxide that has both acidic and basic properties

An oxide that only has basic properties

Answer

Correct Answer: An oxide that has both acidic and basic properties

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What is amphoteric hydroxide?

A neutral compound that does not react with either acids or bases

A base that reacts with both metals and nonmetals

An acid that reacts with both bases and metals

A metal hydroxide that reacts with both bases and acids

Answer

Correct Answer: A metal hydroxide that reacts with both bases and acids

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What is another term for 'amphiprotic species'?

A species that can only act as a base

A species that can only act as an acid

A species that can act as either an acid or a base

A species that cannot act as an acid or a base.

Answer

Correct Answer: A species that can act as either an acid or a base

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What is a amphiprotic species?

A species that can act as either an acid or a base.

A species that can only act as a base.

A proton

A species that can only act as an acid.

Answer

Correct Answer: A species that can act as either an acid or a base.

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What is the base unit of current in the International System?

Ampere

Ohm

Volt

Coulomb

Answer

Correct Answer: Ampere

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What is an amorphous solid?

A solid that has a well-defined structure

A solid that has a disordered structure

A gas

A liquid

Answer

Correct Answer: A solid that has a disordered structure

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What is an amino acid?

A mineral found in eggs.

A compound containing an amino group and a carboxyl group.

A vitamin found in meat.

A protein needed by the body to build muscle.

Answer

Correct Answer: A compound containing an amino group and a carboxyl group.

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What are the functional groups present in an amino acid?

—NH2 and —OH

—COOH and —OH

—NH2 and —COOH

—N2 and —CO2H

Answer

Correct Answer: —NH2 and —COOH

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What is Amine?

The eighth month of the French Republican Calendar

A unit of length

A compound that is structurally derived by replacing one or more hydrogen atoms of ammonia with hydrocarbon groups

A gas with the formula NH₃

Answer

Correct Answer: A compound that is structurally derived by replacing one or more hydrogen atoms of ammonia with hydrocarbon groups

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What is an amide?

A type of carbohydrate

A protein found in milk and eggs

A type of fat

A compound derived from the reaction of ammonia, or a primary or secondary amine, with a carboxylic acid

Answer

Correct Answer: A compound derived from the reaction of ammonia, or a primary or secondary amine, with a carboxylic acid

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What is alpha emission?

The withdrawal of electrons from an atom

The emission of photons from an atom

The emission of a nucleus, or alpha particle, from an unstable nucleus.

The emission of electrons from an atom's surface

Answer

Correct Answer: The emission of a nucleus, or alpha particle, from an unstable nucleus.

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What is an alloy?

Alloys are used in a wide variety of applications, including aerospace and automotive engineering, chemical processing, and marine engineering

Alloys are generally stronger and harder than pure metals.

A mixture of two or more elements, at least one of which is a metal.

A material with metallic properties that is either a compound or a mixture.

Answer

Correct Answer: A material with metallic properties that is either a compound or a mixture.

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What is an allotrope?

One of two or more distinct forms of an element in different physical states

A mixture of two or more different elements in variable proportions

Allotrope one of two or more distinct forms of an element in the same physical state

A pure substance made up of two or more different elements in fixed proportions

Answer

Correct Answer: Allotrope one of two or more distinct forms of an element in the same physical state

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What is an alkyne?

An organic compound that contains a carbon-carbon quadruple bond.

An organic compound that contains a carbon-oxygen double bond.

An unsaturated hydrocarbon containing a carbon–carbon triple bond

A saturated hydrocarbon with a carbon-carbon single bond.

Answer

Correct Answer: An unsaturated hydrocarbon containing a carbon–carbon triple bond

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What is the general formula for Alkyne?

CnH2n-2

CnH2n+2

CnH2n

C2nH2n+2

Answer

Correct Answer: CnH2n-2

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What is an alkyl group?

A group of elements in the periodic table

A gas often used in welding

An alkane less one hydrogen atom

A liquid found in car engines

Answer

Correct Answer: An alkane less one hydrogen atom

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What is the general formula for an alkene?

CnH2n

CH4

H2C

C2H4

Answer

Correct Answer: CnH2n

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What is the general formula for an alkane?

CnH2n

CnH2n+4

CnH2n-4

CnH2n+2

Answer

Correct Answer: CnH2n+2

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What does "Group IIA elements" refer to in the context of the alkaline earth metals?

The reactive metals

The Group IIB elements

The alkali metals

The Group I elements

Answer

Correct Answer: The reactive metals

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Which group do the alkaline earth metals belong to?

Group IIB

Group IB

Group IA

Group IIA

Answer

Correct Answer: Group IIA

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What is the difference between an alkaline dry cell and a Leclanché dry cell?

Alkaline dry cells use potassium hydroxide in place of ammonium chloride.

Alkaline dry cells have a higher voltage than Leclanché dry cells.

Alkaline dry cells are not as common as Leclanché dry cells.

There is no difference between an alkaline dry cell and a Leclanché dry cell.

Answer

Correct Answer: Alkaline dry cells use potassium hydroxide in place of ammonium chloride.

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What are Alkali metals?

The Group IB elements

The Group IA elements

The Group IIIA elements

The Group IIA elements

Answer

Correct Answer: The Group IA elements

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What is the name given to Group IA elements?

Alkali metals

Noble gases

Nonmetals

Metalloids

Answer

Correct Answer: Alkali metals

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What is the group number of Alkali metals?

IIA

IIIA

Answer

Correct Answer: IA

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What is the name for the Group IA elements?

Noble gases

Periodic Table

Halogens

Alkali metals

Answer

Correct Answer: Alkali metals

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What is an aliphatic hydrocarbon?

A hydrocarbon that does not contain carbon

A saturated or unsaturated hydrocarbon

A hydrocarbon that does not contain hydrogen

A hydrocarbon that contains benzene rings

Answer

Correct Answer: A saturated or unsaturated hydrocarbon

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What is the functional group present in Aldehydes?

Sulphonic group

Carbonyl group

Hydrocarbon group

Amine group

Answer

Correct Answer: Carbonyl group

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Which of the following is not a property of alcohol?

It is flammable

It is a compound obtained by substituting a hydroxyl group (—OH) for an —H atom

It is a clear, colorless liquid

It is soluble in water

Answer

Correct Answer: It is a compound obtained by substituting a hydroxyl group (—OH) for an —H atom

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What does the term "Aerosol" refer to?

A cleaning agent

A device that assists in breathing

A colloid consisting of liquid droplets or solid particles dispersed throughout a gas.

A type of medication delivered in an aerosable spray form.

Answer

Correct Answer: A colloid consisting of liquid droplets or solid particles dispersed throughout a gas.

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What is adsorption?

The physical or chemical phenomenon of a substance taking on the properties of a liquid

The binding or attraction of molecules to a surface

A unit operation in which solids are separated from fluids bygravity sedimentation

The study of adhesion and cohesion of surfaces

Answer

Correct Answer: The binding or attraction of molecules to a surface

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What is the product of an addition reaction?

C-O single bond

C-C single bond

C-N single bond

C-C triple bond

Answer

Correct Answer: C-C single bond

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What is an addition polymer?

A polymer formed by linking together many molecules by addition reactions.

A polymer made up of two or more different monomer units.

A polymer with high molecular weight.

A polymer formed by linking together many molecules by condensation reactions.

Answer

Correct Answer: A polymer formed by linking together many molecules by addition reactions.

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List the elements in order of their ease of losing electrons during reactions in aqueous solution

Transition series

Actinide series

Activity series

Alkaline earth metals

Answer

Correct Answer: Activity series

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The activity series is a listing of the elements in order of their ease of _______.

Ability to corrode other materials

Electrons they possess

Losing electrons during reactions in aqueous solution

How they are arranged on the periodic table

Answer

Correct Answer: Losing electrons during reactions in aqueous solution

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What is the activity of a radioactive source?

The number of nuclear disintegrations per unit time occurring in a radioactive material

The number of nuclear fusions per unit time occurring in a radioactive material

The number of nuclear fissions per unit time occurring in a radioactive material

The number of nuclear reactions per unit time occurring in a radioactive material

Answer

Correct Answer: The number of nuclear disintegrations per unit time occurring in a radioactive material

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What is the minimum energy of collision required for two molecules to react called?

Kinetic energy

Activation energy

Acceleration energy

Momentum

Answer

Correct Answer: Activation energy

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What is the activated complex?

An unstable grouping of atoms that can break up to form products

A stable grouping of atoms that cannot break up to form products

A stable grouping of atoms that can break up to form products

An unstable grouping of atoms that cannot break up to form products

Answer

Correct Answer: An unstable grouping of atoms that can break up to form products

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How many elements are in the actinides series?

Answer

Correct Answer: 14

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Which elements are in the Actinides series?

All of the elements in the periodic table

17 elements in total

Actinium plus the 14 elements following it in the periodic table

Actinium plus the 14 elements preceding it in the periodic table

Answer

Correct Answer: Actinium plus the 14 elements following it in the periodic table

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What does "Ka" stand for in Acid-ionization constant?

Weak acid

Acid-dissociation constant

Hydronium ion

Equilibrium constant

Answer

Correct Answer: Equilibrium constant

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What is the equilibrium constant for the ionization of a weak acid?

Keq

Answer

Correct Answer: Ka

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What is an acidic oxide?

A strong acid

An oxide that reacts with acids

An oxide that reacts with bases

A base

Answer

Correct Answer: An oxide that reacts with bases

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Acid base titration curve plots what against what?

PH of a solution of acid against the volume of added base

PH of a solution of base against the volume of added acid

PH of a solution of acid against the volume of added acid

PH of a solution of base against the volume of added base

Answer

Correct Answer: PH of a solution of acid against the volume of added base

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What is an acid base indicator?

A way to make a solution more acidic

A dye that changes color in acidic or basic solutions

A way to neutralize acidity in a solution

A device used to measure the pH of a solution

Answer

Correct Answer: A dye that changes color in acidic or basic solutions

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What is an acid salt?

A salt that only has an acidic hydrogen atom

A salt that does not have an acidic hydrogen atom

A salt that cannot undergo neutralization with bases

A salt that has an acidic hydrogen atom and can undergo neutralization with bases

Answer

Correct Answer: A salt that has an acidic hydrogen atom and can undergo neutralization with bases

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What is the pH of acid rain?

Higher than 5.6

5.6

Lower than 5.6

Answer

Correct Answer: Lower than 5.6

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What is an Acid (Arrhenius definition)?

A substance that produces hydrogen ions when it dissolves in water

A substance that produces oxygen ions when it dissolves in water

A substance that produces chlorine ions when it dissolves in water

A substance that produces hydronium ions when it dissolves in water

Answer

Correct Answer: A substance that produces hydrogen ions when it dissolves in water

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What is an acid?

A substance that produces hydroxide ions, OH- , when it dissolves in water

A substance that produces hydrogen ions, H+ ( hydronium ion, H3O+ ), when it dissolves in water

A substance that produces neither hydronium nor hydroxide ions when it dissolves in water

A substance that produces an equal number of hydronium and hydroxide ions when it dissolves in water

Answer

Correct Answer: A substance that produces hydrogen ions, H+ ( hydronium ion, H3O+ ), when it dissolves in water

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Which of the following is an example of accuracy?

The measure of how close a single measurement is to its true value

The measure of how close a set of measurements are to the mean

The measure of how spread out a set of measurements are

The measure of how close a set of measurements are to each other

Answer

Correct Answer: The measure of how close a single measurement is to its true value

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