Free MCQs & Online Quiz Practice for Exams

Q: As the number of effective collisions between the reacting particles increases, the rate of reaction

A) Decreases

B) Increases

C) Remains the same

D) Both b and c

Q: Which condition will increase the rate of reaction?

A) Decrease in temperature and concentration of reactants

B) Decrease in temperature and increase in concentration of reactants

C) Increase in temperature and decrease in concentration of reactants

D) Increase in temperature and increase in concentration of reactants

Q: A catalyst

A) Decreases the activation energy and decreases the rate of reaction

B) Decreases the activation energy and increases the rate of reaction

C) Increases the activation energy and decreases the rate of reaction

D) Increases the activation energy and increases the rate of reaction

Q: Which aluminum sample would react most rapidly with 1M CuSO₄ solution under the same conditions?

A) 1 gram Al rod

B) 1 gram Al pellets

C) 1 gram Al ribbon

D) 1 gram Al powder

Q: One mole of a reactant reacts with a rate of 0.6 mol dm⁻³ s⁻¹. What is the rate constant of this reaction?

A) 1 s⁻¹

B) 0.3 s⁻¹

C) 0.6 s⁻¹

D) 0.9 s⁻¹

Q: In atmospheric gaseous solution, nitrogen is

A) Solvent

B) Solute

C) Mixture

D) Dispersed phase

Q: In ice cream, sugar is

A) Solute

B) Mixture

C) Solvent

D) None

Q: Elevation of boiling point is a property of

A) Additive

B) Constitutive

C) Colligative

D) None

Q: Change in enthalpy, ΔH_sol, is heat of solution which is

A) Positive

B) Negative

C) Zero

D) May be positive or negative

Q: Freezing point of solution as compared to the solvent is

A) Higher

B) Lower

C) Variable

D) Remains the same

Q: Phenol–water system is an example of

A) Completely miscible liquids

B) Completely immiscible liquids

C) Partially miscible liquids

D) None

Q: Fog is an example of

A) Solution

B) Colloid

C) Suspension

D) Coarse mixture

Q: Which of the following solutes would not form a solution if added to water?

A) KCl

B) CH₄

C) HCl

D) NH₃

Q: Vapour pressure of a given liquid will decrease if

A) Surface area of liquid is increased

B) Total volume of liquid in the container is decreased

C) Volume of the vapour phase is increased

D) The temperature is decreased

Q: For a dilute solution, Raoult's law states that

A) The lowering of vapour pressure is equal to the mole fraction of solute

B) The relative lowering of vapour pressure is equal to the mole fraction of solute

C) The relative lowering of vapour pressure is proportional to the amount of solute

D) The vapour pressure of the solution is equal to the mole fraction of solvent

Q: The boiling points of C₆H₆, CH₃OH, C₆H₅NH₂, and C₆H₅NO₂ are 80°C, 65°C, 184°C and 112°C respectively. Which one will show the highest vapour pressure at room temperature?

A) C₆H₆

B) CH₃OH

C) C₆H₅NH₂

D) C₆H₅NO₂

Q: The process in which the water molecules surround and interact with the solute ions or molecules is called

A) Neutralization

B) Hydration

C) Hydrolysis

D) Hydrogenation

Q: The molarity of pure water in itself is

A) 18

B) 50

C) 59.5

D) 55.6

Q: ΔH per mole is expressed in the units of

A) kJ

B) J

C) cal

D) kcal

Q: Which one of the following is NOT a state function?

A) Enthalpy

B) Heat

C) Temperature

D) Internal energy