February 2019 - Page 17 of 448 -

Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the ___________________?

August 23, 2021February 23, 2019 by admin

Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the ___________________?

A. Activation energy
B. Equilibrium constant
C. Heat of reaction
D. None of these

Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an ______________ reaction?

August 23, 2021February 23, 2019 by admin

Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an ______________ reaction?

A. Elementary
B. Parallel
C. Consecutive
D. None of these

The eddy diffusivity for a liquid in plug flow must be_________________?

August 23, 2021February 23, 2019 by admin

The eddy diffusivity for a liquid in plug flow must be_________________?

A. 1
B. 0
C. ∞
D. Between 0 and 1

In which of the following gaseous phase reversible reactions, the product yield cannot be increased by the application of high pressure ?

August 23, 2021February 23, 2019 by admin

In which of the following gaseous phase reversible reactions, the product yield cannot be increased by the application of high pressure ?

A. N2 + O2 ⇌ 2NO
B. PCl3 + Cl2 ⇌ PCl5
C. N + 3H2 ⇌ 2NH3
D. 2SO2 + O2 ⇌ 2SO3

In a/an _____________ vessel, the fluid enters and leaves following plug flow?

August 23, 2021February 23, 2019 by admin

In a/an _____________ vessel, the fluid enters and leaves following plug flow?

A. Open
B. Closed
C. Open-closed
D. Close-opened

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

August 23, 2021February 23, 2019 by admin

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

When an exothermic reversible reaction is conducted adiabatically, the rate of reaction____________________?

August 23, 2021February 23, 2019 by admin

When an exothermic reversible reaction is conducted adiabatically, the rate of reaction____________________?

A. Continuously increases
B. Continuously decreases
C. Passes through a maximum
D. Passes through a minimum

Reactions with high activation energy are_____________________?

August 23, 2021February 23, 2019 by admin

Reactions with high activation energy are_____________________?

A. Very temperature sensitive
B. Temperature insensitive
C. Always irreversible
D. Always reversible

Which of the following team was declared winner of the skiing gala at the 9,000-foothigh ski slope in Malam Jabba?

August 23, 2021February 23, 2019 by admin

Which of the following team was declared winner of the skiing gala at the 9,000-foothigh ski slope in Malam Jabba?

A. The Civil Aviation Authority team
B. Swat team
C. Pakistan Police team
D. All of these
E. None of them

The conversion in a mixed reactor/accomplishing a reaction A → 3R is 50% when gaseous reactant ‘A’ is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is _______________ second?

August 23, 2021February 23, 2019 by admin

The conversion in a mixed reactor/accomplishing a reaction A → 3R is 50% when gaseous reactant ‘A’ is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is _______________ second?

A. 0.5
B. 1
C. 2
D. 3