Question : In 1931, who recognised that an aromatic compound must have an odd number of pairs of electrons, which can mathematically be written as 4n+2 (n = 0,1,2,3 etc.)?

Question : In 1845, which German chemist published a method for the synthesis of acetic acid, a natural product containing two carbon atoms?

Question : Vinegar is

Question : Which German chemist used the technique of preparing hydrocarbons by electrolysis of solutions of salts of fatty acids?

Question : The Nobel Prize in Chemistry 1951 was awarded jointly to Edwin Mattison McMillan and ______ for their discoveries in the chemistry of the transuranium elements.