The product $(X)$ of the following reaction is:

Identify the reagents $(1-4)$ required for the transformations shown and arrange them in the correct order.
$(1)$ $LiAlH_4$
$(2)$ $OsO_4$
$(3)$ $NaIO_4$
$(4)$ $NaBH_4$

Why is there a large difference in the boiling points of butanal and butan$-1-$ol?

The general name of the compound formed by the reaction between aldehyde and alcohol is

Give applications of cyanohydrins with acetaldehyde with suitable reactions. $OR$ Give following conversions by using acetaldehyde as starting material.
$(a)$ Lactic acid and acrylic acid
$(b)$ Alanine
$(c)$ $1$-amino propane-$2$-ol

What is the product formed when a ketone reacts with $Mg-Hg$ in the presence of water?