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February 2019

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

Chemical Reaction /
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

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

Chemical Reaction

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

Chemical Reaction /
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 which of the following gaseous phase reversible reactions, the product yield cannot be increased by the application of high pressure ? Read More »

Chemical Reaction

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

Chemical Reaction /
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

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

Chemical Reaction

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

Pakistan Current Affairs MCQs /
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

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

Pakistan Current Affairs MCQs

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?

Chemical Reaction /
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

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? Read More »

Chemical Reaction