Glycol forms diethylene glycol on heating with

• A

  Anhy. $\mathrm{Z}\mathrm{n}\mathrm{C}{\mathrm{l}}_2$
• B

  Conc. ${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$
• C

  Anhy. $\mathrm{A}\mathrm{l}\mathrm{C}{\mathrm{l}}_3$
• Correct answer
  D

  ${\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_4$

Solution

Glycol forms diethylene glycol on heating with ${\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_4$ as follows

Hence, the correct answer is option: 'D'.