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February 2019

In a zero order reaction, reactants concentration does not change with time and the_________________?

Chemical Reaction /
In a zero order reaction, reactants concentration does not change with time and the_________________?

A. Time for half change is half the time taken for completion of the reaction
B. Time for half change is independent of the initial concentration
C. Time for completion of the reaction is independent of the initial concentration
D. Reaction rate is trebled when the initial concentration is trebled

In a zero order reaction, reactants concentration does not change with time and the_________________? Read More »

Chemical Reaction

In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is___________________?

Chemical Reaction /
In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is___________________?

A. More
B. Less
C. Same
D. Either A. or B., depends on other factors

In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is___________________? Read More »

Chemical Reaction

Brunauer, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation ?

Chemical Reaction /
Brunauer, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation ?

A. Langmuir’s assumption applies to every adsorbed layer
B. There is no dynamic equilibrium between successive layer
C. The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer
(except the first one) is involved in each of the evaporation process
D. None of these

Brunauer, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation ? Read More »

Chemical Reaction

A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are_____________________?

Chemical Reaction /
A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are_____________________?

A. Equal in size
B. Of different sizes
C. Of such size that the ratio of their volumes is < 5
D. None of these

A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are_____________________? Read More »

Chemical Reaction

The value of ‘n’ for a chemical reaction A → B, whose reaction rate is → CA n, will be _______________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled?

Chemical Reaction /
The value of ‘n’ for a chemical reaction A → B, whose reaction rate is → CA n, will be _______________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled?

A. 0
B. 1
C. 2
D. 3

The value of ‘n’ for a chemical reaction A → B, whose reaction rate is → CA n, will be _______________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled? Read More »

Chemical Reaction