Question

Glycerol reacts with potassium bisulphate to supply ?
A. Allyl iodide
B. Allyl sulphate
C. Acrylaldehyde
D. Glycerol trisulphate

Answer 1

Hint:When Glycerol is heated with potassium bisulphate undergoes dehydration with the elimination of water molecules from the glycerol molecule. Because of this, resulting within the formation of unsaturated aldehyde. It forms a glycerol molecule.

Complete answer:Glycerol on heating potassium bisulfate then undergoes dehydration with the elimination of water molecules from the glycerol molecule. Ultimately, resulting in the formation of unsaturated aldehyde that is an acrylic aldehyde.Chemical equation given by:
\[
  C{H_2}OH - KHS{O_4}{\text{ }}\underrightarrow { - 2{H_2}O}{\text{ }}C{H_2} = C = CH - OH \\
  Tautomerize:CH2 = CH - CH = O \\
 \]
(Acrolein also referred to as acraldehyde).Acrolein is the best unsaturated aldehyde. It is a colorless liquid with a piercing, acrid scent. It is produced industrially from propylene and in particular used as a biocide and a constructing block to different chemicals, collectively with the amino acid methionine.Acrolein is ready industrially by means of oxidation of propene. The technique makes use of air because the supply of oxygen and calls for metal oxides as heterogeneous catalysts:
\[C{H_2}CHC{H_3} + {\text{ }}{O_2}{\text{ }} \to {\text{ }}C{H_2}CHCHO{\text{ }} + {\text{ }}{H_2}O\]
About 500,000 hundreds of acrolein are produced on this way yearly in North the United states, Europe, and Japan. Moreover, all acrylic acid is produced through the short formation of acrolein.

Hence the correct option is C.

Note:Acrolein is an especially electrophilic compound and a reactive one, because of its high toxicity. It is a fantastic Michael acceptor, as a result its beneficial response with thiols. It forms acetals quite simply, a prominent one being the spirocycle derived from pentaerythritol, alkylidene pentaerythritol.