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101.

What is the use of KMnO4 in the manufacture of methanol?(a) To increase pH(b) To decrease pH(c) To remove impurities(d) To increase turbidityI got this question in examination.Enquiry is from Synthetic Organic Chemical Industries topic in section Synthetic Organic Chemical Industries of Chemical Technology

Answer»

The correct choice is (c) To REMOVE impurities

Easiest EXPLANATION: KMnO4 is added to remove TRACE of impurities such as ketones and aldehydes. PRESENCE of impurities decreases the PURITY of methanol.
Discussion
102.

Ethylene can be produced from ethane by ______________________(a) Catalytic cracking(b) Thermal cracking(c) Catalytic reforming(d) Hydro formingI have been asked this question in an international level competition.I'd like to ask this question from Synthetic Organic Chemical Industries topic in section Synthetic Organic Chemical Industries of Chemical Technology

Answer»

The correct OPTION is (b) Thermal CRACKING

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.
Discussion