Chemical Reaction

In a semi-batch reactor __________________?

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In a semi-batch reactor __________________?

A. Mixing takes place in axial direction only
B. Velocity of reaction can be controlled
C. Condition similar to plug flow reactor exists
D. Residence time is constant

A catalyst loses its activity due to__________________?

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A catalyst loses its activity due to__________________?

A. Loss in surface area of the active component
B. Agglomeration of metal particles caused by thermal sintering of the solid surface
C. Covering of the catalytic active sites by a foreign substance
D. All A., B. and C.

Second order consecutive irreversible reaction as shown in the bellow figure, were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (k1/k2) ?

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Second order consecutive irreversible reaction as shown in the bellow figure, were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (k1/k2) ?

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

For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of ‘P’ is doubled. If the reaction rate is proportional to Cp n, then what is the value of ‘n’ for this chemical reaction ?

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For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of ‘P’ is doubled. If the reaction rate is proportional to Cp n, then what is the value of ‘n’ for this chemical reaction ?

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