Question

(i) How is methanal obtained from methanol?(ii) Write the chemical equation of the reaction involved in the preparation of methanal from methanol.(iii) Mention one test of an aqueous solution of methanal in the biology laboratory.ORComplete the following reaction equations:(i) $CH_3 CH_2OH + 3O_2 \longrightarrow$(ii) $HCHO + H_2 \longrightarrow$(iii) $CH_3COOH + C_2H_5OH \longrightarrow$

Answer 1

when methanol is heated in excess in presence of oxygen we get methanal

Answer 2

Answer:

Reaction of methanal with Grignard reagent (CH

3

MgBr) and subsequent hydolysis to yield ethanol or ethyl alcohol. Then, ethanol is oxidised to ethanal by removing two hydrogen atoms.