ESAS · Question Bank

Chemistry

340 of 345 questions match · page 2 of 17. Answer in your head first, then check the solution.

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#21📘 reviewer_appEasy
What is a solution consisting of a weak acid and its conjugate base, or a weak base and its conjugate acid?
ASeawater
BSalt
CBuffer
DAqueous solution
#22📘 reviewer_appEasy
What is the most common chemical reaction, which is the reaction of materials with oxygen accompanied by the giving off of energy in the form of heat?
ACombustion
BExothermic reaction
CEndothermic reaction
DKinetic reaction
#23📘 reviewer_appEasy
What is the area of chemistry that concerns with the rate at which chemical reactions occur?
Achemical collision theory
Bchemical dynamics
Cchemical kinematics
Dchemical kinetics
#24📘 reviewer_appEasy
What is the minimum amount of energy needed for a chemical reaction to occur called?
AInitial energy
BActivation energy
CIgnition energy
DCatalystic energy
#25📘 reviewer_appEasy
What is a substance that, when added to a reaction mixture, increases the rate of the reaction but is itself unchanged after the reaction is done?
Ahydroxide ions
Baccelerators
Ccatalyst
Dneutral substance
#26📘 reviewer_appEasy
What is a substance that slow down a chemical reaction?
AInhibitors
BRetardant
CCatalyst
DDecelerators
#27📘 reviewer_appEasy
How are catalyst classified
Ahomogenous and heterogenous
Bslow and fast
Cpure and composite
Dacidic and basic
#28📘 reviewer_appEasy
What type of catalyst exists in same phase as the reactants in the reaction mixture?
Ahomogenous catalyst
Bheterogenous catalyst
Cpure catalyst
Dcomposite catalyst
#29📘 reviewer_appEasy
What type of catalyst exists in separate phase as the reactants in the reaction mixture?
Ahomogenous catalyst
Bheterogenous catalyst
Cpure catalyst
Dcomposite catalyst
#30📘 reviewer_appEasy
Most heterogenous catalyst are _________
Aliquids
Bsolids
Cgases
Dplasma
#31📘 reviewer_appEasy
Which one is a factor that affects the rate of chemical reactions?
Atemperature
Bconcentration and surface area of reactants
Cpresence of a catalyst
Dall of these
#32📘 reviewer_appEasy
What refers to the state at which the rates of the forward and backward reactions are equal?
AChemical equilibrium
BReversible equilibrium
CReaction equilibrium
DHaber equilibrium
#33📘 reviewer_appEasy
What is the study of heat or required by the chemical reaction?
Astoichemistry
Bthermochemistry
Cthermodynamics
Denthalpy
#34📘 reviewer_appEasy
What is the ratio of the equilibrium concentration of the products to the equilibrium concentrations of the reactants with each species concentration raised to the corresponding stoichiometric coefficient found in the balanced reaction?
AEquilibrium constant
BEquilibrium concentration
CChemical equilibrium
DReaction quotient
#35📘 reviewer_appEasy
What term is used as a qualitative description of the extent of a chemical reaction?
AEquilibrium position
BChemical equilibrium
CEquilibrium
DReaction equilibrium
#36📘 reviewer_appEasy
What quantity is used to determine how far from equilibrium the chemical reaction is?
AReaction index
BChemical quotient
CEquilibrium quotient
DReaction quotient
#37📘 reviewer_appEasy
What states that if a change in positions is imposed on a system at equilibrium position will shift in the direction that tends to reduce the effects of that change?
AHess' principle
BCatalyst Effect
CHaber process principle
DLe Chatelier's principle
#38📘 reviewer_appEasy
What refers to the reaction of oxygen with an element or compound?
AReduction
BOxidation
COxygenation
DOxygenization
#39📘 reviewer_appEasy
The loss of electron by a substance is known as __________
Aoxidation
Bcovalent process
Creduction
Dionic process
#40📘 reviewer_appEasy
The gain of electrons by a substance is known as ___________
Aoxidation
Bcovalent process
Creduction
Dionic process

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