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If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to
[A].

the intrinsic activation energy E.

[B].

(E + ED) where ED is activation due to diffusion.

[C].

(E + ED)/2

[D].

ED/2

Answer: Option D

Explanation:

No answer description available for this question.

If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

It is more difficult to manufacture a part designed using two decimal places than the same part using four decimal places.

Dimensioning, Technical Drawing /
Question: It is more difficult to manufacture a part designed using two decimal places than the same part using four decimal places.
[A].

True

[B].

False

Answer: Option B

Explanation:

No answer description available for this question.

It is more difficult to manufacture a part designed using two decimal places than the same part using four decimal places. Read More »

Dimensioning, Technical Drawing

A first order reaction A B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: A first order reaction A B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by
[A].

diffusion within the pellet.

[B].

reaction.

[C].

external mass transfer.

[D].

none of the above.

Answer: Option A

Explanation:

No answer description available for this question.

A first order reaction A B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

For the gaseous reaction 2A B, where the feed consists of 50 mole % A and 50 mole % inerts, the expansion factor is

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: For the gaseous reaction 2A B, where the feed consists of 50 mole % A and 50 mole % inerts, the expansion factor is
[A].

1

[B].

-0.5

[C].

-0.25

[D].

0

Answer: Option C

Explanation:

No answer description available for this question.

For the gaseous reaction 2A B, where the feed consists of 50 mole % A and 50 mole % inerts, the expansion factor is Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?
[A].

1.6

[B].

2

[C].

2.24

[D].

2.5

Answer: Option D

Explanation:

No answer description available for this question.

At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R? Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

For a tubular reactor with space time ‘τ’ and residence time ‘θ’, the following statement holds good.

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: For a tubular reactor with space time ‘τ’ and residence time ‘θ’, the following statement holds good.
[A].

τ and θ are always equal.

[B].

τ = θ , when the fluid density changes in the reactor.

[C].

τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant.

[D].

τ = θ , for a non-isothermal reactor.

Answer: Option C

Explanation:

No answer description available for this question.

For a tubular reactor with space time ‘τ’ and residence time ‘θ’, the following statement holds good. Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to
[A].

1

[B].

0.5

[C].

0.1

[D].

0

Answer: Option C

Explanation:

No answer description available for this question.

For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

Consider the ‘n’ th order irreversible liquid phase reaction A B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot ?

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: Consider the ‘n’ th order irreversible liquid phase reaction A B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot ?
[A].

CA0 Vs t1/2

[B].

ln CA0 Vs t1/2

[C].

CA0 Vs ln t1/2

[D].

ln CA0 Vs ln t1/2

Answer: Option C

Explanation:

No answer description available for this question.

Consider the ‘n’ th order irreversible liquid phase reaction A B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot ? Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering