Class quiz 03 August 2023

Which of the following pore sizes can be considered microporous ?

• >2mm

• >50 mm

• None of the pores is micrporous

• Both pores are microporous

Which of the following is true about micropores?

• They always reduce the total surface area

• They are the only pores in porous materials

• They can hinder diffusion in pores

• They are always more than macropores in any support

The unit for Weight hourly space velocity is

• Kg^-1

• h^-1

• m^-3

• Pa^-1

Which of the following statement is not correct

• Catalysts do not change the stoichiometric coefficients

• Heterogenous catalyst are applicable to gases only

• Catalysts lower the activation energy hence enhancing the reaction rate

• Catalyst activity is its ability to increase the rate of a chemical reaction

What is the order of the reaction withe respect to specie B

-r_A =kC_AⁿC_B^m

Match the following as they apply to catalysis

• Catalyst active ingredient

• Material responsible for catalyst activity

• Support

• Catalyst whose entire system is active

• Bulk

• Provision of surface area for active materials

Catalyst activity is always twice its selectivity

• False

• True

Which of the curves represents a 0th (zeroth) order reaction

• A

• B

• C

Catalyst activity is constant always

• True

• False

The total site (C_T.) can change as a result of

• number of active sites

• Number of reactants

• number pof prodiucts

• catalyst poisoning