Give one of the possible structural formulas of the substance “A” C4H6O, which gives the reaction of the “silver mirror”

Give one of the possible structural formulas of the substance “A” C4H6O, which gives the reaction of the “silver mirror”, provides bromine water and a cold solution of potassium permanganate. upon interaction with hydrogen in the presence of a nickel catalyst “A” is converted into a compound of the composition C4H10O. write the reaction equations.

Let’s compose a structural formula:
H2C = CH – CH2 – CHO – vinyl acetaldehyde.
Let’s write the equations:
С4Н6О + Br2 = CBr4 + O2 + H2 – oxidation with bromine water, bromine water itself is discolored;
H2C = CH2 – CH2 – CHO + Ag2O = H2C = CH2 – CH2 – COOH + 2Ag – oxidation of aldehyde to acid, silver is released, silver mirror reaction;
2H2C = CH2 – CH2 – CHO + 2KMnO4 = 2H2C = CH2 – CH2 – CO – K + 2MnO2 + H2O – oxidation with potassium permanganate, while its solution becomes colorless;
Н2С = СН2 – СН2 – СНО + 2Н2 = Н3С – СН2 – СН2 – СН2 – ОН – reduction, butanol (С4Н10О) was obtained;
These reactions show the connection of aldehydes with carboxylic acids, alcohols. The reactions take place at the expense of the carbonyl group: CHO.