Petrochemicals MCQs : This section focuses on the "Petrochemicals" in Chemical Technology. These Multiple Choice Questions (MCQ) should be practiced to improve the Chemical Technology skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
____________ are the chemical products obtained from petroleum by refining.
Explanation: Petrochemicals are the chemical products obtained from petroleum by refining.
Which of the following are petrochemical classes?
C. Both A and B
D. None of the above
Explanation: The two most common petrochemical classes are olefins (including ethylene and propylene) and aromatics (including benzene, toluene and xylene isomers).
tetrachloroethylene also called?
A. vinyl chloride
C. polyvinyl chloride
D. isopropyl alcohol
Explanation: tetrachloroethylene also called perchloroethylene; used as a dry cleaning solvent and degreaser
Chemical plants produce olefins by steam cracking of natural gas liquids like ethane and propane.
C. Can be true or false
D. Can not say
Explanation: True, Chemical plants produce olefins by steam cracking of natural gas liquids like ethane and propane.
Which of the following is the simplest aromatic hydrocarbon?
Explanation: benzene : the simplest aromatic hydrocarbon
Which of the following is not a primary chemical?
C. Acetic acid
Explanation: Some of the primary chemicals are Alcohol, Benzene, Toluene, and Acetone. Acetic acid is secondary chemical formed using acetylene from calcium carbide.
Which of the following is a thermoplastic?
D. Ortho Xylene
Explanation: Polystyrene is a thermoplastic where others are feedstock type petrochemicals. Some other thermoplastics are polypropylene, PVC, HDP, low density polyethylene etc.
Hydro forming of petrochemical stocks doesn’t produce _______________
D. Ethyl Benzene
Explanation: Petrochemical stocks hydro forming produces BTX (toluene, benzene, Xylene) and hydrogen but not ethyl benzene. These are the principal raw materials
Ethylene can be produced from ethane by ______________________
A. Catalytic cracking
B. Thermal cracking
C. Catalytic reforming
D. Hydro forming
Explanation: Ethylene of about 75% yield can be produced from ethane (4% of natural gas) by thermal cracking. Most of the ethylene is produced from refinery gases.
Propylene used as a monomer and a chemical feedstock.
C. Can be Yes Or No
D. Can not say
Explanation: Yes, propylene used as a monomer and a chemical feedstock