February 2019 | Page 52 of 448 | AnsweringExams.Com

The irreversible reaction, X → Y, is the special case of the reversible reaction, X ⇌ Y, in which the _____________________?

August 23, 2021February 19, 2019 by admin

The irreversible reaction, X → Y, is the special case of the reversible reaction, X ⇌ Y, in which the _____________________?

A. Equilibrium constant is infinite
B. Fractional conversion of ‘A’ at equilibrium is unity
C. Concentration of ‘A’ at equilibrium is zero
D. All A., B. and C.

Half life period of decomposition of a liquid ‘A’ by irreversible first order reaction is 12 minutes. The time required for 75% conversion of ‘A’ is _____________ minutes?

August 23, 2021February 19, 2019 by admin

Half life period of decomposition of a liquid ‘A’ by irreversible first order reaction is 12 minutes. The time required for 75% conversion of ‘A’ is _____________ minutes?

A. 18
B. 24
C. 6
D. 12

The fractional volume change between no conversion and complete conversion, for the isothermal gas phase reaction, 2A → R, is___________________?

August 23, 2021February 19, 2019 by admin

The fractional volume change between no conversion and complete conversion, for the isothermal gas phase reaction, 2A → R, is___________________?

A. 0.5
B. -0.5
C. 1
D. 1.5

For a heterogeneous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate – rA0 is invariant with total pressure. The rate controlling step is______________________?

August 23, 2021February 19, 2019 by admin

For a heterogeneous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate – rA0 is invariant with total pressure. The rate controlling step is______________________?

A. Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase
B. Surface reaction between absorbed A and absorbed B
C. Surface reaction between A in the gas phase and absorbed B
D. Desorption of C

Arrhenius equation represents graphically the variation between the ______________ and temperature?

August 23, 2021February 19, 2019 by admin

Arrhenius equation represents graphically the variation between the ______________ and temperature?

A. Rate of reaction
B. Frequency factor
C. Rate constant
D. Activation energy

The extent of a reaction is ___________________?

August 23, 2021February 19, 2019 by admin

The extent of a reaction is ___________________?

A. Different for reactants and products
B. Dimensionless
C. Depends on the stoichiometric co-efficient
D. All of the above

For the reversible reaction A ⇌ 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium ?

August 23, 2021February 19, 2019 by admin

For the reversible reaction A ⇌ 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium ?

A. 0.253
B. 0.338
C. 0.152
D. 0.637

Bulk diffusion in catalyst pore _______________ with increase in pressure?

August 23, 2021February 19, 2019 by admin

Bulk diffusion in catalyst pore _______________ with increase in pressure?

A. Increases
B. Decreases
C. Remains unchanged
D. Increases exponentially

Autocatalytic reactions are best carried out in a_________________?

August 23, 2021February 19, 2019 by admin

Autocatalytic reactions are best carried out in a_________________?

A. CSTR
B. CSTR in series
C. Plug flow reactor
D. Recycle reactor

Cold shot cooling is only practical when the feed temperature is ______________ than the reaction temperature?

August 23, 2021February 19, 2019 by admin

Cold shot cooling is only practical when the feed temperature is ______________ than the reaction temperature?

A. Higher
B. Much higher
C. Lower
D. Much lower