Select the alkyne listed below that, upon treatment with ozone followed by water, would not produce carbon dioxide and a carboxylic acid as the final products?
o 1-pentyne
o propyne
o 1-butyne
o 1-hexyne
o ethyne

The only exception is Ethyne

Explanation:

Homologous members of alkynes formed ozonide and when treated with ozone and water, then decomposed to form ketones which are then oxidized to carbon dioxide and carboxylic acids.

Ethyne( Acetylene) is an exception as it gives glyoxal as well as formic acid on reacting with ozone.

C2H2 + O3 ==> OCHCHO + HCO2H

Therefore, Ethyne is the only exception.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: