Chemical Reactions MCQs
Which of the following is The residual hardness in ion-exchange process?
(A). 10-15 ppm
(B). Â 5-10 ppm
(C). Â Â 0-2 ppm
(D). Â 20-30 ppm
(E). None of these
Multiple Choice Question Answer: Â c
The raw water that is used for the ion-exchange process must be the turbid.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â a
The half-life period of zero order reaction is directly proportional to which of the following?
(A). Â Initial concentration of reactants
(B). Â Rate constant
(C). Â Final concentration of reactants
(D). Â Concentration of products
(E). None of these
Multiple Choice Question Answer: Â a
For a zero order reaction, the rate of reaction is independent of which of the following?
(A). Â Temperature
(B). Â Â Concentration of reactants
(C). Nature of reactants
(D). Â Effect of catalyst
(E). None of these
Multiple Choice Question Answer:Â b
The exhausted cation exchange column is regenerated by passing which of the following solution?
(A). Â Conc. NaCl
(B). Â Dil. NaCl
(C). Â Conc. HCl
(D). Â Dil. HCl
(E). None of these
Multiple Choice Question Answer: Â d
What is the Ion-free water coming out from the exchanger called?
(A). Â Demineralised water
(B). Â Disinfected water
(C). Â Coagulated water
(D). Â Potable water
(E). None of these
Multiple Choice Question Answer:Â a
Not an example of zero order reaction is ____________
(A). Â The Inversion of the cane sugar in presence of mineral acids
(B). Â The Decomposition of the ammonia over a molybdenum surface
(C). Â The Thermal decomposition of the HI on a gold surface
(D). Â Photochemical combination of hydrogen and chlorine
(E). None of these
Multiple Choice Question Answer:Â a
The half life period of first order reaction is 15 min. Its rate constant will be equal to which of the following?
(A). Â Â 0.00462 min-1
(B). Â 0.462 min-1
(C). Â 0.0462 min-1
(D). Â 0.562 min-1
(E). None of these
Multiple Choice Question Answer: Â c
In a first order reaction, the time required for the completion of 99% is how much times to the time required for the completion of half of the reaction?
(A). Â 5
(B). Â 50
(C). Â 20
(D). Â 10
(E). None of these
Multiple Choice Question Answer:Â d
Not an example of second order reaction is ______________
(A). Â Acid catalyzed hydrolysis of ester
(B). Â Saponification of ester
(C). Â Oxidation of hydrogen bromide
(D). Â Gaseous decomposition of hydrogen iodide
(E). None of these
Multiple Choice Question Answer: Â a
The half life period of nth order reaction varies inversely to which of the following power of the initial concentration of the reactants?
(A). Â nth
(B). Â (n-1)th
(C). Â (n+1)th
(D). Â 2nth
(E). None of these
Multiple Choice Question Answer: Â b
Which of the following is The order of the reaction, if the time of half-completion is changed from 50 sec to 25 sec, when the initial concentration is changed from 0.5 to 1M?
(A). Â 0
(B). Â 1
(C). Â 3
(D). Â 2
(E). None of these
Multiple Choice Question Answer: Â d
If A compound decomposes according to the first order rate law with a half life period of 30 min, then the fraction of the remaining compound after 120 min is _____________
(A). Â 0.625
(B). Â 0.025
(C). Â 0.25
(D). Â 0.0625
(E). None of these
Multiple Choice Question Answer: Â d
In a first order reaction, the time required for the completion of 99% is which of the following for its 90% completion?
(A). Â Same
(B). Â Twice
(C). Â Thrice
(D). Â Negligible
(E). None of these
Multiple Choice Question Answer: Â b
For a second order reaction, the rate is always proportional to the square root of a concentration of the same reactant.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â a
The statement that is incorrect about the demineralised water is ____________
(A). Â This is as pure as distilled water
(B). Â This is fit for domestic use
(C). Â This is very good for use in high pressure boilers
(D). Â This can be made by the distillation or by using the cation and anion exchangers
(E). None of these
Multiple Choice Question Answer: Â b
For a first order reaction, the half life period is independent of which of the following?
(A). Â Rate constant
(B). Â Final concentration of the reactants
(C). Â Initial concentration of the reactants
(D). Â Concentration of products
(E). None of these
Multiple Choice Question Answer: Â c
The thermal decomposition of nitrogen pentaoxide in the gaseous phase is the example of which of the following?
(A). Â First order reaction
(B). Â Half order reaction
(C). Â Zero order reaction
(D). Â Second order reaction
(E). None of these
Multiple Choice Question Answer: Â a
The ion that gets released from the cation exchange column is ___________
(A). Â K+Â
(B). Â Na+
(C). Â H+
(D). Â Ca+2
(E). None of these
Multiple Choice Question Answer: Â c
the ion that gets released from the anion exchange column is
(A). Â CO3-2
(B). SO4-2
(C).  Cl–
(D).   OH–
(E). None of these
Multiple Choice Question Answer: Â d
Which of the following is the Ion-exchange resin?
(A). Â Organic polymer with porous structure
(B). Â Low molecular weight
(C). Â Linear
(D). Â Soluble
(E). None of these
Multiple Choice Question Answer:Â a
The exhausted anion exchange column is regenerated by passing which of the following solution?
(A). Â Dil. KOH
(B). Â Conc. KOH
(C). Â Dil. NaOH
(D). Â Conc. NaOH
(E). None of these
Multiple Choice Question Answer: Â c
In ion-exchange process, what are the capital cost and the operational expenses?
(A). Â Low, high
(B). Â High, high
(C). Â High, low
(D). Â Low, low
(E). None of these
Multiple Choice Question Answer: Â b
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