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Question:

Which of the following is the industrial method of preparation of acetaldehyde?

CH3COCl+H2Pd−−−→BaSO4CH3CHO+HCl

CH2=CH2+H2OPd2+−−−→CH3CHO

All of the above

CH3CNSnCl2−−−→HClCH2CH=NHH3O+−−−→CH3CHO

Solution:

The industrial method of production of acetaldehyde is the oxidation of ethylene by the Wacker process, which involves oxidation of ethylene using a homogeneous palladium/copper system. Hence, C is the correct answer.