Write the reaction equation: Methane-Bromomethane-methanol-formaldehyde – formic acid

Let us write down the reaction equations for organic substances:
CH4 + Br2 = CH3Br + HBr – substitution reaction, bromomethane was obtained;
CH3Br + KOH = CH3OH + KBr – exchange, methanol was released;
CH3OH + CuO = HCOH + Cu + H2O – oxidation of methanol, formaldehyde was formed;
НСОН + 2Cu (OH) 2 = HCOOH + Cu2O + 2H2O – oxidation of aldehyde, formic acid was obtained.
these reactions confirm the connection between alkanes, alcohols, aldehydes and carboxylic acids.
Reaction products find practical applications. Methane and methanol are used as fuel and formic acid is used as a medicine for rheumatism.