16.Aromatisation is the conversion of

17.Sodium propionate on decarboxylation with soda-lime gives

18.Acetylene can be converted into methyl vinyl ether on reaction with

19.A mixture of sodium butanoate and 2-methyl sodium propanoate is heated with sodalime. The resulting compound will be

20.The minimum temp. at which oil gives sufficient vapours to form an explosive mixture with air is known as