Particle Size Measurement and Pseudo Order Reaction MCQs Questions Answers

 

Which of the following is the minimum size of particle which can be separated through sieve analysis?

(A).  75 microns

(B).  100 microns

(C).  20 microns

(D). 44 microns

(E). None of these

Multiple Choice Question Answer:  d

The method of particle size measurement is ______

(A). All of these

(B).  Microscopic examination

(C).  Sedimentation analysis

(D).  Sieve analysis

(E). None of these

Multiple Choice Question Answer:  a

Which of the following is The instrument that is used for the examination of particle size = 0.5 micron?

(A).  Telescope

(B).  Electron microscope

(C).  Microscope

(D).  All of these

(E). None of these

Multiple Choice Question Answer:  c

Sedimentation analysis is applicable to the liquid dispersions that are containing how much % solids?

(A).  5-10

(B).  2-5

(C).  1-3

(D).  4-8

(E). None of these

Multiple Choice Question Answer:  b

The Sedimentation techniques are particularly useful for the particle size ranging from Which of the following?

(A). 40-2 µm

(B).   50-10 µm

(C).  100-50 µm

(D).  80-40µm

(E). None of these

Multiple Choice Question Answer:  a

What measure does the current that is generated in the photoelectric cell represents?

(A).  Cohesivity

(B).  Adhesivity

(C).  Turbidity

(D).  Viscosity

(E). None of these

Multiple Choice Question Answer:  c

In the photo-extinction method, a source of light is directed through Which of the following suspension?

(A).  Kerosene in cement

(B).  Water in cement

(C).  Cement in water

(D).  Cement in kerosene

(E). None of these

Multiple Choice Question Answer:  d

The Adsorption method for measurement of the total surface area always involves the evaluation of the quantity of Which of the following?

(A).  Nitrogen gas

(B).  Oxygen gas

(C).  Helium gas

(D).  Argon gas

(E). None of these

Multiple Choice Question Answer:  a

Due to what the Fibrous fillers have a high capacity for absorbing energy?

(A).  Composition

(B).  Size

(C).  Shape

(D).  Surface area

(E). None of these

Multiple Choice Question Answer:  c

______________ is an example of pseudo first order reaction?

(A).  Saponification of ester

(B).  Oxidation of hydrogen bromide

(C).  Gaseous decomposition of hydrogen iodide

(D).  Inversion of cane sugar

(E). None of these

Multiple Choice Question Answer:  d

. yet which order kinetics are called pseudo unimolecular reaction Reactions which are bimolecular?

(A).  First

(B).  Second

(C).  Zero

(D).  Third

(E). None of these

Multiple Choice Question Answer:  a

which of the following are based on the collision model, the atoms at the top of the potential energy hill?

(A).  Transition state

(B).  Energetic atom

(C).  Steric factor

(D).  Activation energy

(E). None of these

Multiple Choice Question Answer:  a

_______ concentration plot is linear for a first-order reaction.A is one of the reactants

(A).  [A]2 versus time

(B).  Ln[A] versus time

(C).  [A] versus time

(D).  v[A] versus time

(E). None of these

Multiple Choice Question Answer:  b

. Termolecular refer to which one?

(A).  3 molecules colliding

(B).  5 molecules colliding

(C).  4 molecules colliding

(D).  2 molecules colliding

(E). None of these

Multiple Choice Question Answer:  a

. Threshold energy is the sum of which one?

(A).  external energy and activation energy of reactants

(B).  internal energy and activation energy of reactants

(C).  external energy ad internal energy of reactants

(D).  thermal energy and activation energy

(E). None of these

Multiple Choice Question Answer:  b

. the rate = k[NO]2[O2] for a certain reaction, when the initial concentration of NO is tripled, what is the initial rate?

(A).  Increases by a factor of six

(B).  Increases by a factor of three

(C).  Decreases by a factor of nine

(D).  Increases by a factor of nine

(E). None of these

Multiple Choice Question Answer:  d

. which of the following is the rate-determining step in a series of reactions?

(A).  Slowest

(B).  Simplest

(C).  Fastest

(D).  Fast and complex

(E). None of these

Multiple Choice Question Answer:  a

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