CONCEPTS 1

Front

Which of the following is incorrect?
Options:
The stoichiometric of the reaction defines the elemental balance and therefore relates the number of molecules of reactants and products participating in the reactions.
When the network is broken down into elementary or single-event steps, the network represents the true mechanism of the chemical transformation leading from initial reactants to final products through intermediates.
A limiting reactant is a reactant whose concentration at the start of the reaction is the least of all reactants relative to the required stoichiometric amount needed for complete conversion.

Back

The Arrhenius equation can be derived from theoretical considerations using either of the two competing theories: collision theory and transfission state theory.

Front

Which of the following is incorrect?
Options:
Selectivity of a product is the ratio of the rate of production of that product to the rate of production of all products combined.
For gas-phase reactions, volumetric concentration or partial pressure are equally useful, and these can be related by the thermodynamic equation of state.
A catalyst is a material that increases the rate of both the forward and the reverse reactions of a reaction step, with no net consumption or generation of catalyst by the reaction.
The complex parallel matrix is the matrix that confines the network of products that interpole on the positive maximum reactants and products.

Back

The complex parallel matrix is the matrix that confines the network of products that interpole on the positive maximum reactants and products.

Front

Which of the following does not belong to the Chain Reaction?
Phosgene Synthesis, Ozone Conversion to CO₂ Presence in Chlorine, Hydrogen Bromide Synthesis, Chain Polymerization

Back

Ozone Conversion to CO₂ Presence in Chlorine

Front

Which is not a part of a generic mechanism of Chain Polymerization? Options: Initiation, Propagation, termination by coupling, termination by proportionation

Back

termination by proportionation

Front

Biochemical reactions such as aerobic and anaerobic fermentations occur in the presence of living organisms or cells, such as bacteria, algae, and yeast. These reactions can be considered as ______________ by the organism.

Back

biocatalyzed

Front

This mechanism of adsorption and reaction relates the gas concentrations and partial pressures in the vicinity of the catalyst surface to the absorbed species concentration at the active sites, which in turn determined the surface reaction rates.

Back

Langmuir-Hinshelwood

Front

Which is not a part of a generic mechanism of Polymerization Reactions? Options: Suspension Polymerization, Bulk Polymerization, Emulsion Polymerization

Back

Nonhomogenized Polymerization

Front

The biomass that bioreactor converts into more cells or biomass (cell growth), proteins, and metabolic products. Any of these can be the desired product in a commercial fermentation.

Back

substrate

Front

This mechanism occurs when the poisoning of a pore surface begins at the mouth of the pore and moves gradually inward.

Back

Shell Progressive Poisoning

Front

This is primarily due to rearrangement of the active sites at high temperature due to sintering. Sintering results in agglomeration of active ingredients (lower dispersion).

Back

Thermal deactivation