ACS CP ACS CP Industrial & Process Chemistry 2

Question 1

In chemical engineering, 'selectivity' in a reactor refers to:

Accepted Answer

The fraction of converted reactant that forms the desired product relative to all products

Answer

The ratio of actual yield to theoretical maximum yield of desired product

Answer

The efficiency of catalyst utilization expressed as turnover frequency

Answer

The ratio of reaction rate to diffusion rate in a porous catalyst

Question 2

Process safety management (PSM) under OSHA 29 CFR 1910.119 applies to facilities that:

Accepted Answer

Handle highly hazardous chemicals above specified threshold quantities

Answer

Handle any amount of listed hazardous chemicals

Answer

Have more than 10 employees working with chemical processes

Answer

Import or export regulated chemical substances

Question 3

Which type of reactor achieves uniform concentration and temperature throughout its volume at steady state?

Accepted Answer

Continuous stirred tank reactor (CSTR)

Answer

Plug flow reactor (PFR)

Answer

Batch reactor

Answer

Fixed bed reactor

Question 4

In the chlor-alkali process, which products are co-produced at the anode and cathode respectively?

Accepted Answer

Chlorine at anode; sodium hydroxide and hydrogen at cathode

Answer

Hydrogen at anode; chlorine and sodium at cathode

Answer

Sodium at anode; chlorine and hydrogen at cathode

Answer

Oxygen at anode; chlorine and NaOH at cathode

Question 5

The Lower Explosive Limit (LEL) and Upper Explosive Limit (UEL) define:

Accepted Answer

The concentration range of a flammable gas/vapor in air that can sustain combustion

Answer

The minimum and maximum temperatures at which a vapor can ignite

Answer

The minimum and maximum pressures for safe operation of pressure vessels

Answer

The lower and upper flash points of flammable liquids

Question 6

Turnover frequency (TOF) in catalysis is defined as:

Accepted Answer

Number of substrate molecules converted per active site per unit time

Answer

Number of catalyst regeneration cycles per hour

Answer

Total mass of product formed per gram of catalyst per hour

Answer

Ratio of active catalyst surface area to total surface area