The relation between rate and time for a zero order reaction in a variable volume reactor is expressed as ____

( frac{C_{A0}}{ _A} ln( frac{V}{CC_A}) ) = kt

( frac{C_{A0}}{ _A}ln( frac{V}{V_0}) ) = t

( frac{1}{ _A} ln( frac{V}{V_0}) ) = kt

( frac{C_{A0}}{ _A} ln( frac{V}{V_0}) ) = kt

( frac{C_{A0}}{ _A} ln( frac{V}{CC_A}) ) = kt

The relationship between conversion and concentration for isothermal varying volume systems is ____

XA = ( frac{{1- frac{C_A}{C_{A0}}}}{1-( _A frac{C_A}{C_{A0}})} )

XA = ( frac{{1- frac{C_A}{C_{A0}}}}{1+( _A frac{C_A}{C_{A0}})} )

XA = ( frac{{1- frac{C_A}{C_{A0}}}}{1-( _A frac{C_A}{C_{A0}})} )

XA = ( frac{{1+ frac{C_A}{C_{A0}}}}{1+( _A frac{C_A}{C_{A0}})} )

XA = ( frac{{1+ frac{C_A}{C_{A0}}}}{1-( _A frac{C_A}{C_{A0}})} )

Final concentration of the reactant A in terms of conversion, for a variable volume batch reactor is ____

CA = ( frac{C_{A0}(1 X_A)}{( _A X_A)} )

CA = ( frac{C_{A0}(1+ X_A)}{(1+ _A X_A)} )

CA = ( frac{C_{A0}(1 X_A)}{(1- _A X_A)} )

CA = ( frac{C_{A0}(1 X_A)}{(1+ _A X_A)} )

CA = ( frac{C_{A0}(1 X_A)}{( _A X_A)} )

The fractional change in volume of a system for variable volume systems, expressed in terms of the number of moles is ____

= ( frac{Total , number , of , moles , fed}{Change , in , number , of , moles , of , the , reaction , system , when , the , reaction , is , complete} )

= ( frac{Change , in , number , of , moles , of , the , reaction , system , when , the , reaction , is , complete}{Total , number , of , moles , fed} )

= ( frac{Total , number , of , moles , fed}{Change , in , number , of , moles , of , the , reaction , system , when , the , reaction , is , complete} )

= ( frac{Number , of , moles , left , when , the , reaction , is , complete}{Total , number , of , moles , fed} )

= ( frac{Total , number , of , moles , fed}{Number , of , moles , left , when , the , reaction , is , complete} )

9 + Mcqs in Stoichiometry Batch Reactors with Variable Volume in Chemical Reaction Engineering Page 1 McqOptions

1.	The plot of -ln(1- ( frac{ V}{ _A V_0}) ) and time for first order reaction in a varying volume reactor is ____
A.	<img alt="Plot of -ln(1- V AV0) & time for first order reaction in volume reactor - option a" class="alignnone size-full wp-image-283967" height="241" sizes="(max-width: 243px) 100vw, 243px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10a.png 243w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10a-150x150.png 150w" width="243"/>
B.	<img alt="Plot of -ln(1- V AV0) & time for first order reaction in volume reactor - option b" class="alignnone size-full wp-image-283968" height="243" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10b.png" width="238"/>
C.	<img alt="Plot of -ln(1- V AV0) & time for first order reaction in volume reactor - option c" class="alignnone size-full wp-image-283969" height="241" sizes="(max-width: 240px) 100vw, 240px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10c.png 240w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10c-150x150.png 150w" width="240"/>
D.	<img alt="Plot of -ln(1- V AV0) & time for first order reaction in volume reactor - option d" class="alignnone size-full wp-image-283970" height="243" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10d.png" width="235"/>
Answer» C. <img alt="Plot of -ln(1- V AV0) & time for first order reaction in volume reactor - option c" class="alignnone size-full wp-image-283969" height="241" sizes="(max-width: 240px) 100vw, 240px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10c.png 240w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-question-papers-q10c-150x150.png 150w" width="240"/>

Discussion

2.	State true or false. For negative values of _A, there is a reduction in volume of the reaction mixture as the reaction proceeds.
A.	True
B.	False
Answer» B. False

Discussion

3.	The relation between rate and time for a zero order reaction in a variable volume reactor is expressed as ____
A.	( frac{C_{A0}}{ _A}ln( frac{V}{V_0}) ) = t
B.	( frac{1}{ _A} ln( frac{V}{V_0}) ) = kt
C.	( frac{C_{A0}}{ _A} ln( frac{V}{V_0}) ) = kt
D.	( frac{C_{A0}}{ _A} ln( frac{V}{CC_A}) ) = kt
Answer» D. ( frac{C_{A0}}{ _A} ln( frac{V}{CC_A}) ) = kt

Discussion

4.	The relationship between conversion and concentration for isothermal varying volume systems is ____
A.	X<sub>A</sub> = ( frac{{1- frac{C_A}{C_{A0}}}}{1+( _A frac{C_A}{C_{A0}})} )
B.	X<sub>A</sub> = ( frac{{1- frac{C_A}{C_{A0}}}}{1-( _A frac{C_A}{C_{A0}})} )
C.	X<sub>A</sub> = ( frac{{1+ frac{C_A}{C_{A0}}}}{1+( _A frac{C_A}{C_{A0}})} )
D.	X<sub>A</sub> = ( frac{{1+ frac{C_A}{C_{A0}}}}{1-( _A frac{C_A}{C_{A0}})} )
Answer» B. X<sub>A</sub> = ( frac{{1- frac{C_A}{C_{A0}}}}{1-( _A frac{C_A}{C_{A0}})} )

Discussion

5.	For the reaction A 2R containing 50% moles initially, the value of _A is ____
A.	1
B.	0.75
C.	0.5
D.	0.9
Answer» D. 0.9

Discussion

6.	Final concentration of the reactant A in terms of conversion, for a variable volume batch reactor is ____
A.	C<sub>A</sub> = ( frac{C_{A0}(1+ X_A)}{(1+ _A X_A)} )
B.	C<sub>A</sub> = ( frac{C_{A0}(1 X_A)}{(1- _A X_A)} )
C.	C<sub>A</sub> = ( frac{C_{A0}(1 X_A)}{(1+ _A X_A)} )
D.	C<sub>A</sub> = ( frac{C_{A0}(1 X_A)}{( _A X_A)} )
Answer» D. C<sub>A</sub> = ( frac{C_{A0}(1 X_A)}{( _A X_A)} )

Discussion

7.	For the reaction A 4R, the value of _A is ____
A.	-3
B.	3
C.	4
D.	2
Answer» C. 4

Discussion

8.	The fractional change in volume of a system for variable volume systems, expressed in terms of the number of moles is ____
A.	= ( frac{Change , in , number , of , moles , of , the , reaction , system , when , the , reaction , is , complete}{Total , number , of , moles , fed} )
B.	= ( frac{Total , number , of , moles , fed}{Change , in , number , of , moles , of , the , reaction , system , when , the , reaction , is , complete} )
C.	= ( frac{Number , of , moles , left , when , the , reaction , is , complete}{Total , number , of , moles , fed} )
D.	= ( frac{Total , number , of , moles , fed}{Number , of , moles , left , when , the , reaction , is , complete} )
Answer» B. = ( frac{Total , number , of , moles , fed}{Change , in , number , of , moles , of , the , reaction , system , when , the , reaction , is , complete} )

Discussion

9.	State true or false. A variable volume reactor is the one in which the reaction proceeds by a change in number of moles at a given pressure and temperature.
A.	True
B.	False
Answer» B. False

Discussion

Explore topic-wise MCQs in Chemical Reaction Engineering.

The plot of -ln(1- ( frac{ V}{ _A V_0}) ) and time for first order reaction in a varying volume reactor is ____

State true or false.For negative values of A, there is a reduction in volume of the reaction mixture as the reaction proceeds.

The relation between rate and time for a zero order reaction in a variable volume reactor is expressed as ____

The relationship between conversion and concentration for isothermal varying volume systems is ____

For the reaction A 2R containing 50% moles initially, the value of A is ____

Final concentration of the reactant A in terms of conversion, for a variable volume batch reactor is ____

For the reaction A 4R, the value of A is ____

The fractional change in volume of a system for variable volume systems, expressed in terms of the number of moles is ____

State true or false.A variable volume reactor is the one in which the reaction proceeds by a change in number of moles at a given pressure and temperature.

State true or false.
For negative values of _A, there is a reduction in volume of the reaction mixture as the reaction proceeds.

For the reaction A 2R containing 50% moles initially, the value of _A is ____

For the reaction A 4R, the value of _A is ____

State true or false.
A variable volume reactor is the one in which the reaction proceeds by a change in number of moles at a given pressure and temperature.