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(C) When glycerol $(CH_2OH-CHOH-CH_2OH)$ is heated with concentrated sulfuric acid $(H_2SO_4)$,it undergoes dehydration. Two molecules of water are re

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Prop-$2$-enal

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(C) When glycerol $(CH_2OH-CHOH-CH_2OH)$ is heated with concentrated sulfuric acid $(H_2SO_4)$,it undergoes dehydration. Two molecules of water are removed from the glycerol molecule to form acrolein (prop-$2$-enal),which has a characteristic pungent odor. The reaction is: $CH_2OH-CHOH-CH_2OH \xrightarrow{conc. H_2SO_4, \Delta} CH_2=CH-CHO + 2H_2O$.

When glycerol is heated with concentrated sulfuric acid,a compound with a pungent odor is formed. What is this compound?

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