Question

Rate constant in case of first order reaction is

A. inversely proportional to the concentration units
B. independent of concentration units  
C. directly proportional to concentration units
D. inversely proportional to the square of concentration units
Answer :   independent of concentration units
Solution :
The rate constant of a first order reaction has only time unit. It has no concentration unit. This means the numerical value of $$k$$  for a first order reactions is independent of the unit in which concentration is expressed.

Releted MCQ Question on
Physical Chemistry >> Chemical Kinetics

Releted Question 1

If uranium (mass number 238 and atomic number 92) emits an $$\alpha $$ -particle, the product has mass no. and atomic no.

A. 236 and 92
B. 234 and 90
C. 238 and 90
D. 236 and 90
View Answer
Releted Question 2

The rate constant of a reaction depends on

A. temperature
B. initial concentration of the reactants
C. time of reaction
D. extent of reaction
View Answer
Releted Question 3

The specific rate constant of a first order reaction depends on the

A. concentration of the reactant
B. concentration of the product
C. time
D. temperature
View Answer
Releted Question 4

A catalyst is a substance which

A. increases the equilibrium concentration of the product
B. changes the equilibrium constant of the reaction
C. shortens the time to reach equilibrium
D. supplies energy to the reaction
View Answer

Practice More Releted MCQ Question on
Chemical Kinetics

Practice More MCQ Question on Chemistry Section

Physical ChemistrySome Basic Concepts in ChemistryStoichiometryStates of Matter Solid, Liquid and GasAtomic StructureChemical ThermodynamicsSolutionsSolid StateSurface ChemistryChemical EquilibriumIonic EquilibriumChemical KineticsRedox ReactionElectrochemistryNuclear Chemistry
Inorganic ChemistryChemical Bonding and Molecular StructureOres and MetallurgyClassification of Elements and Periodicity in PropertiesHydrogenS - Block ElementsP - Block ElementsD and F Block ElementsCo - ordination CompoundsQualitative AnalysisPreparation and Properties of CompoundsEnvironmental Chemistry
Organic ChemistryGeneral Organic ChemistryIsomerismPurification and Characterisation of Organic CompoundsHydrocarbons (Alkane, Alkene and Alkyne)Aromatic hydrocarbonElectrophilic Aromatic Substitution (Haloalkanes and Haloarenes)Alkyl and Aryl HalideReactions on BenzeneAlcohol, Phenol and EtherAldehyde and KetoneCarboxylic AcidOrganic Compounds Containing NitrogenName ReactionsPolymersBiomoleculesChemistry in Everyday LifePractical Organic Chemistry