Chemical Reaction

In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants) ?

Byadmin February 23, 2019August 23, 2021

In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants) ?

A. A
B. N
C. A + N
D. A – N

Chemical Reaction

Decomposition rate of a liquid ‘X’ which decomposes as per the reaction as shown in the bellow figure is given by________________?

Decomposition rate of a liquid ‘X’ which decomposes as per the reaction as shown in the bellow figure is given by________________?

A. K1 . CX
B. (K1 + K2 + K3) CX
C. (K1 + K2) CX
D. (K2 + K3) CX

Read More Decomposition rate of a liquid ‘X’ which decomposes as per the reaction as shown in the bellow figure is given by________________?
Chemical Reaction

The rate expression for a heterogeneous catalytic reaction is given by, – rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) ?

The rate expression for a heterogeneous catalytic reaction is given by, – rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) ?

A. E
B. E + ΔHA
C. E + ΔHA – ΔHR)
D. ΔHA + ΔHR

Read More The rate expression for a heterogeneous catalytic reaction is given by, – rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) ?
Chemical Reaction

What is the maximum possible value of FR(mole/sec.) ?

What is the maximum possible value of FR(mole/sec.) ?

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

Read More What is the maximum possible value of FR(mole/sec.) ?
Chemical Reaction

For series reaction, the relative yield__________________?

For series reaction, the relative yield__________________?

A. Is always greater for plug-flow reactor than for the single CSTR of the same volume
B. Statement in A. is wrong
C. Decreases with increasing conversion
D. Both A. and C. hold good

Read More For series reaction, the relative yield__________________?
Chemical Reaction

Following isothermal kinetic data are obtained in a basket type of mixed flow reactor for a porous catalyst. Determine the role of pore diffusion and external mass transfer processes ?

Following isothermal kinetic data are obtained in a basket type of mixed flow reactor for a porous catalyst. Determine the role of pore diffusion and external mass transfer processes ?

A. Strong pore diffusion control and mass transfer not controlling
B. Both pore diffusion and mass transfer not controlling
C. Both pore diffusion and mass transfer controlling
D. Mass transfer controlling

Read More Following isothermal kinetic data are obtained in a basket type of mixed flow reactor for a porous catalyst. Determine the role of pore diffusion and external mass transfer processes ?
Chemical Reaction

Holding time for flow reactors is _______________ the space time, for constant fluid density ?

Holding time for flow reactors is _______________ the space time, for constant fluid density ?

A. Double
B. Triple
C. Equal to
D. None of these

Read More Holding time for flow reactors is _______________ the space time, for constant fluid density ?