FREE Master of Chemistry: Industrial Chemistry Questions and Answers
How else could citric acid be made besides from lemons?
A significant amount of citric acid needed for numerous chemical and biological reactions is produced via aerobic fermentation.
Which differences are exploited by crystallization?
When a combination crystallizes, the difference in melting points causes the mixture to separate.
Feed mixtures made of non-renewable resources like coal and petroleum are needed for chemical processes. What are non-renewable sources replaced by?
Many of the goods produced by coal and oil are also produced by biomass, which is less polluting.
Which way of operation is not appropriate for a chemical or biochemical plant?
A chemical plant will function discontinuously, irrationally wasting time.
When is a separation step in a manufacturing process not necessary?
Since no reactants remain after a complete conversion of reactants to products, separation is not necessary.
Which of the following separation methods is based on volatility differences?
Distillation is a process that depends on volatility variations. Example: Boiling point and vapor pressure.
Will the aforementioned reaction call for a separation procedure?
Since all reactants are completely converted into product in the aforementioned reaction, no separation procedure is necessary.
What changes the physiological circumstances in a biochemical plant?
Because only under certain conditions can microorganism activity be maximized, the physiological condition must be depending on the microbe.
Why is there a need for separation if just 5% of ethylene is transformed to ethylene glycol?
Reusing the unreacted reactant can lower manufacturing costs because less new reactant will need to be added and a nearly complete conversion can be accomplished.
How is the diethyl ether removed from ethylene during the production of ethanol?
A light ends tower makes the easy removal of diethyl ether possible.
Which of the following is NOT a separation procedure that is important?
A chemical reaction cannot be sped up by a separation process unless the byproduct is impeding the production of the desired product. A catalyst is typically used to speed up a reaction.
Of the following machines, which one doesn't require a chemical separation method?
The components that give coffee its acidity and bitterness are removed by the coffee maker along with the oil from the coffee beans.
Which of the following is a requirement for a biochemical plant to operate?
There is a danger that the organisms in a biochemical plant will perish if any condition is applied. So it is desired to be in a nn-pathological state.
Of the following, which is NOT a representation of a chemical process?
Instead of a chemical reaction in and of itself, a flow chart is utilized to illustrate a computer program.
What method of separation is employed when a chemical reaction aids in separation during a separation operation?
When the separation process is followed by a chemical reaction, such as the absorption of SO2 by limestone slurry, reactive distillation is best used in these circumstances.
Which of the following separation methods DOES NOT take place during the production of citric acid?
Since no two products are formed during the production of itric acid that need to be separated due to differences in boiling points, distillation is not necessary.