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February 2019

According to the ‘law of mass action’, the rate of reaction is directly proportional to the__________________?

Chemical Reaction /
According to the ‘law of mass action’, the rate of reaction is directly proportional to the__________________?

A. Equilibrium constant
B. Volume of the reaction vessel
C. Nature of the reactants
D. Molar concentration of the reactants

According to the ‘law of mass action’, the rate of reaction is directly proportional to the__________________? Read More »

Chemical Reaction

In a chemical reaction as shown in the bellow figure, it is observed that the (i) Rate of formation of ‘P’ is doubled on doubling the concentration of ‘X’ (ii) Rate of formation of ‘P’ is quadrupled on doubling the concentration of ‘Y’ (iii) Doubling the concentration of ‘Z’ does not affect the rate of formation of ‘P’ What is the order of the above chemical reaction ?

Chemical Reaction /
In a chemical reaction as shown in the bellow figure, it is observed that the (i) Rate of formation of ‘P’ is doubled on doubling the concentration of ‘X’ (ii) Rate of formation of ‘P’ is quadrupled on doubling the concentration of ‘Y’ (iii) Doubling the concentration of ‘Z’ does not affect the rate of formation of ‘P’ What is the order of the above chemical reaction ?

A. Zeroth order
B. First order
C. Second order
D. Third order

In a chemical reaction as shown in the bellow figure, it is observed that the (i) Rate of formation of ‘P’ is doubled on doubling the concentration of ‘X’ (ii) Rate of formation of ‘P’ is quadrupled on doubling the concentration of ‘Y’ (iii) Doubling the concentration of ‘Z’ does not affect the rate of formation of ‘P’ What is the order of the above chemical reaction ? Read More »

Chemical Reaction

With an increase in pressure in gaseous phase chemical reactions, the fractional conversion ______________ when the number of moles decreases?

Chemical Reaction /
With an increase in pressure in gaseous phase chemical reactions, the fractional conversion ______________ when the number of moles decreases?

A. Increases
B. Decreases
C. Remain unaffected
D. Unpredictable from the data

With an increase in pressure in gaseous phase chemical reactions, the fractional conversion ______________ when the number of moles decreases? Read More »

Chemical Reaction

A liquid phase reaction is to be carried out under isothermal conditions. The reaction rate as a function of conversion has been determined experimentally and is shown in the figure given below. What choice of reactor or combination of reactors will require the minimum overall reactor volume, if a conversion of 0.9 is desired ?

Chemical Reaction /
A liquid phase reaction is to be carried out under isothermal conditions. The reaction rate as a function of conversion has been determined experimentally and is shown in the figure given below. What choice of reactor or combination of reactors will require the minimum overall reactor volume, if a conversion of 0.9 is desired ?

A. CSTR followed by a PFR
B. PFR followed by a CSTR
C. CSTR followed by a PFR followed by a CSTR
D. PFR followed by a CSTR followed by a PFR

A liquid phase reaction is to be carried out under isothermal conditions. The reaction rate as a function of conversion has been determined experimentally and is shown in the figure given below. What choice of reactor or combination of reactors will require the minimum overall reactor volume, if a conversion of 0.9 is desired ? Read More »

Chemical Reaction

What is the order of chemical reaction as shown in the bellow figure, if it is found that the reaction rate doubles on doubling the concentration of B and also the reaction rate doubles when the concentrations of both A & B were doubled and quadrupled when the concentrations of both B & C were doubled ?

Chemical Reaction /
What is the order of chemical reaction as shown in the bellow figure, if it is found that the reaction rate doubles on doubling the concentration of B and also the reaction rate doubles when the concentrations of both A & B were doubled and quadrupled when the concentrations of both B & C were doubled ?

A. 1
B. 2
C. 3
D. 4

What is the order of chemical reaction as shown in the bellow figure, if it is found that the reaction rate doubles on doubling the concentration of B and also the reaction rate doubles when the concentrations of both A & B were doubled and quadrupled when the concentrations of both B & C were doubled ? Read More »

Chemical Reaction

The reaction rate constants at two different temperatures T1 and T2 are related by _________________?

Chemical Reaction /
The reaction rate constants at two different temperatures T1 and T2 are related by _________________?

A. ln (k2/k1) = (E/R) (1/T2 – 1/T1)
B. ln (k2/k1) = (E/R) (1/T1 – 1/T2)
C. exp (k2/k1) = (E/R) (1/T2 – 1/T1)
D. exp (k2/k1) = (E/R) (1/T1 – 1/T2)

The reaction rate constants at two different temperatures T1 and T2 are related by _________________? Read More »

Chemical Reaction

The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is _____________________ that of mixed reactor?

Chemical Reaction /
The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is _____________________ that of mixed reactor?

A. Greater than
B. Equal to
C. Smaller than
D. Unpredictable from the data

The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is _____________________ that of mixed reactor? Read More »

Chemical Reaction