Hi) CH2=CH2------o3 h2o
Answers
The complete question is what happens when ethene(CH2=Ch2) reacts with ozone (o3) followed by hydrolysis(H2O).
The products are 2 molecules of formaldehyde and water.
This type of ozonolysis followed by hydrolysis in presence of active metal like zinc is known as reductive hydrosis.
The first step is reaction of ozone with alkene to form an unstable compound known as ozonoid of alkene as the alkene is ethene the ozonoid is of ethene (ethene ozonoid) with formula as OCH2OOCH2 and is cyclic. The ozonoid are explosive compounds.
Therefore the second step is reduction of ozonoid in situ in presence of zinc and water to give aldehydes and ketone here in this case we get two molecules of formaldehyde (methanal) and a molecule of peroxide with reacts with zinc to form zinc oxide and water.
The reaction take place in presence of organic solvent like carbon tetrachloride(CCl4). and low temperature.Reaction is:--
CH2=CH + O3--------> (OCH2OOCH2) (ozonoid)
(OCH2OOCH2) + H2O--------> 2 HCHO(formaldehyde) + H2O2(peroxide)
H2O2 +zinc-------> ZnO + H2O