AP EAPCET 08-Jul-2022 Shift 2 Paper

Formaldehyde ( HCHO ) is used to preserve biological specimens. It changes the tissue on a molecular level, so that the bacteria can't feed on the tissues.
Thus, among the given compound only ethene ( A ) on ozonolysis followed by treatment with zinc. dust and water give formaldehyde (P). The reaction involve is as follows.