Question

Which one of the following chemical reaction is true?

• A. Methane is prepared by eletrolying a concentrated acqueus solution of potassium acetate
• B. Substitution products are formed when methane reacts with chlorine in diffused sunlight
• C. Methane can not be prepared be heating an etherial solution of alkyl iodide with metallic sodium
• D. Ethylene can be prepared by heating excess of ethyl alcohol with conc. sulphuric acid at ${144}^o$C

Answer 1

Answer: (B)

In aqueous solution, on the addition of potassium acetate, the alcohol was split up into ethane, potassium ethyl carbonate, carbon dioxide and acetic ester.

Substitution products chloromethane, dichloromethane, trichloromethane or tetrachloromethane are formed when methane reacts with chlorine in diffused sunlight.

Methane can be prepared be heating an ethereal solution of alkyl iodide with metallic sodium. An ethereal solution of an alkyl halide (preferably bromide or iodide) gives an alkane when heated with sodium metal.

Ethanol can be dehydrated to give ethene by heating it with an excess of concentrated sulphuric acid at about ${170}^o$C.