Signal normally used to study non-ideal flow by stimulus response technique is _______________ input?

A. Pulse
B. Step
C. Both A. & B.
D. Neither A. nor B.

For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a _________________ reactor?

A. Stirred tank
B. Tubular flow
C. Batch
D. Fixed bed

Organic catalysts differ from the inorganic catalyst in the sense that the former is________________?

A. Active at cryogenic temperatures only
B. Prohibitively costly
C. Proteinous in nature
D. Active at very high temperature only

Which of the following is used for calcination of limestone and dolomite in industrial practice?

A. Fluidised bed reactor
B. Moving bed reactor
C. Fixed bed reactor
D. None of these

For a heterogeneous catalytic reaction____________________?

A. Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction
B. A relatively small amount of catalyst can cause the conversion of large amount of reactants
which does not mean that catalyst concentration is important
C. The catalyst does not form an intermediate complex with the reactant

A catalyst in a chemical reaction _______________ free energy change in the reaction?

A. Increases
B. Decreases
C. Either A. or B.; depends on the type of catalyst
D. Neither A. nor B.

. In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2__________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio of SO2 to air?

A. (i) increases (ii) decreases
B. (i) decreases (ii) increases
C. (i) increases (ii) increases
D. (i) decreases (ii) decreases

A backmix reactor_________________?

A. Is same as plug-flow reactor
B. Is same as ideal stirred tank reactor
C. Employs mixing in axial direction only
D. Is most suitable for gas phase reaction

If in the gaseous phase reaction, N2O4 ⇌ 2NO2, x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be___________________?

A. (1 + x)
B. (1 – x)
C. (1 + x)2
D. (1 – x)2

‘N’ plug flow reactors in series with a total volume ‘V’ gives the same conversion as a single plug flow reactor of volume ‘V’ for _______________ order reactions?

A. First
B. Second
C. Third
D. Any