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February 2019

The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called_________________?

Chemical Reaction /
The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called_________________?

A. Operational yield
B. Relative yield
C. Selectivity
D. None of these

The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called_________________? Read More »

Chemical Reaction

If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatelier’s principle)?

Chemical Reaction /
If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatelier’s principle)?

A. Decreases
B. Increases
C. Remains unaltered
D. Changes unpredictably

If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatelier’s principle)? Read More »

Chemical Reaction

With increase in K2/K1 in case of a unimolecular type elementary reactions as shown in the bellow figure, the fractional yield of ‘R’ in mixed reactor (for a given conversion of ‘A’) ?

Chemical Reaction /
With increase in K2/K1 in case of a unimolecular type elementary reactions as shown in the bellow figure, the fractional yield of ‘R’ in mixed reactor (for a given conversion of ‘A’) ?

A. Decreases
B. Increases
C. Increases linearly
D. Remain same

With increase in K2/K1 in case of a unimolecular type elementary reactions as shown in the bellow figure, the fractional yield of ‘R’ in mixed reactor (for a given conversion of ‘A’) ? Read More »

Chemical Reaction

Name the youngest 12 years old Pakistani Student selected in NASA one week internship program, which includes training for next-generation astronaut training experience.

Pakistan Current Affairs MCQs /
Name the youngest 12 years old Pakistani Student selected in NASA one week internship program, which includes training for next-generation astronaut training experience.A. Arfa Karim
B. Raadeyah Aamir
C. Malala Yousafzai
D. None of these

 

Name the youngest 12 years old Pakistani Student selected in NASA one week internship program, which includes training for next-generation astronaut training experience. Read More »

Pakistan Current Affairs MCQs