Paraldehyde, a sedative and hypnotic agent, is prepared by treatment of acetaldehyde with an acid catalyst. Draw the structure of the fourth intermediate in this reaction.

I'm sorry but, is there a list of options?

Firstly, the planetary model of the atom  failed  to explain why individual atoms produce discrete  line spectra. in fact, according to rutherford's model, each individual atom should produce a  continuous  line spectrum. the second flaw to his model was the fact that electrons orbit the nucleus in a circular fashion.

Answersplit hydrogen atoms hydrogen ions (h+) and electrons