When acetaldehyde is heated with Fehling solution,a red precipitate is formed. Which of the following is that?

The major product formed in the following reaction sequence is $CH_3-CH=CH_2$ $\xrightarrow[\substack{(iii) \ CH_3-CH_2-CHO \\ (iv) \ CrO_3}]{\substack{(i) \ HBr, \text{ peroxide} \\ (ii) \ Mg}}$

Among the given ketones,the one which does not enolize is:

Identify the major product of the following reaction:

Aldehydes and ketones can be reduced to hydrocarbons by using:

The compound formed when propanone is made to react with ethyl magnesium bromide followed by hydrolysis is