MCQ
What is the structure of $L-$ glyceraldehyde?
- A

- B

- C

- ✓Both $(a)$ and $(b)$



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Ethanol $\xrightarrow{{PB{r_3}}}X\,\xrightarrow{{alc.\,KOH}}\,Y$$\,\xrightarrow[{(ii)\,{H_2}O\,,\,heat}]{{(i)\,{H_2}S{O_4},\,room\,\,temperature}}Z$
the product $Z$ is
$X_2 + Y_2 \rightarrow 2XY,$ is given below :
$(i)\,\, X_2 \rightarrow X + X\, (fast)$
$(ii)\,\,X + Y_2 \rightleftharpoons XY + Y\, (slow)$
$(iii)\,\,X + Y \rightarrow XY\, (fast)$
The overall order of the reaction will be
Reason : Alcohols leading to conjugated alkenes are dehydrated to a greater extent