Chemical Reaction Archives - Page 15 of 44 -

The importance of diffusion in a catalyst are increased by ____________________?

The importance of diffusion in a catalyst are increased by ____________________?

A. Large catalyst particle size
B. An active surface of the catalyst
C. Small pore diameter
D. All A., B. and C.

The importance of diffusion in a catalyst are increased by ____________________? Read More »

A gaseous reactant is introduced in a mixed reactor of 3 litres volume at the rate of 1 litre/second. The space time is ______________ seconds?

A gaseous reactant is introduced in a mixed reactor of 3 litres volume at the rate of 1 litre/second. The space time is ______________ seconds?

A. 1
B. 3
C. 1/3
D. 32

A gaseous reactant is introduced in a mixed reactor of 3 litres volume at the rate of 1 litre/second. The space time is ______________ seconds? Read More »

Chemical Reaction

With increase in initial concentration, the fractional conversion of a first order reaction in a given time___________________?

Chemical Reaction / admin

With increase in initial concentration, the fractional conversion of a first order reaction in a given time___________________?

A. Increases
B. Decreases
C. Remain constant
D. Unpredictable

With increase in initial concentration, the fractional conversion of a first order reaction in a given time___________________? Read More »

Chemical Reaction

The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are_______________?

Chemical Reaction / admin

The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are_______________?

A. 2 & 1
B. 11 & 2
C. 2 & 2
D. 1 & 1

The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are_______________? Read More »

Chemical Reaction

Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature ?

Chemical Reaction / admin

Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature ?

A. Pore diffusion
B. Film diffusion
C. Ash layer diffusion
D. Chemical reaction

Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature ? Read More »

Chemical Reaction

The temperature dependence of reaction rate constant (K) by Arrhenius law is given by_______________?

Chemical Reaction / admin

The temperature dependence of reaction rate constant (K) by Arrhenius law is given by_______________?

A. K α e-E/RT
B. K α eE/RT
C. K α T . e-E/RT
D. K α √T . e-E/RT

The temperature dependence of reaction rate constant (K) by Arrhenius law is given by_______________? Read More »

Chemical Reaction

In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for________________?

Chemical Reaction / admin

In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for________________?

A. Fast reactions in catalyst of small pore diameter
B. Fast reaction in catalyst of large pore diameter
C. Slow reactions in catalyst of small pore diameter
D. Slow reactions in catalyst of large pore diameter

In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for________________? Read More »

Chemical Reaction

Half-life period for a first order reaction is _____________ the initial concentration of the reactant?

Chemical Reaction / admin

Half-life period for a first order reaction is _____________ the initial concentration of the reactant?

A. Directly proportional to
B. Inversely proportional to
C. Independent of
D. None of these

Half-life period for a first order reaction is _____________ the initial concentration of the reactant? Read More »

Chemical Reaction

Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in ______________ in conversion?

Chemical Reaction / admin

Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in ______________ in conversion?

A. Decrease
B. Increase
C. No change
D. Either A. or B., depends on the type of reaction

Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in ______________ in conversion? Read More »

Chemical Reaction

In case of a _____________ reactor, the composition in the reactor and at the exit of the reactor is the same ?

Chemical Reaction / admin

In case of a _____________ reactor, the composition in the reactor and at the exit of the reactor is the same ?

A. Semi-batch
B. Tubular
C. Batch
D. Back-mix

In case of a _____________ reactor, the composition in the reactor and at the exit of the reactor is the same ? Read More »

Chemical Reaction