A catalyst is a substance which
A.increases the equiliibrium concentration of the product
B.changes the equilibrium constant of the reaction
C.shortens the time to reach equilibrium
D.suppliies energy to the reaction.
Category: Chemical Reaction Engineering Mcqs
Which of the following does not influence the rate of a reaction?
A.Temperature
B.Concentration of reactants
C.Catalyst
D.Number of molecules of reactants taking part in a reaction.
The action of a catalyst follows its ability to change the
A.heat of reaction
B.heat of formation of the product
C.activation energy
D.equilibrium constant.
A catalyst
A.decreases the activation energy
B.alters the reaction mechanism
C.increases the frequency of collisions of reacting species
D.all of these answers.
The rate constant for a first-order reaction
A.depends on the unit of time
B.has units of reciprocal time
C.does not change on changing the concentration units
D.all of the above
A balanced chemical equation is in accordance with
A.law of gaseous volumes
B.law of Avogadro
C.law of constant proportions
D.law of conservation of mass
A reaction which proceeds with evolution of heat is called
A.thermo-nuclear reaction
B.endothermic reaction
C.exothermic reaction
D.photochemical reaction
The irreversible reaction is simply the special case of the reversible reaction if
A.The concentration of the reactant at equilibrium conditions is zero
B.the fractional conversion of the reactant at equilibrium conditions is zero
C.the equilibrium constant is zero
D.the equilibrium constant is one
