Question

$ C{{H}_{3}}C{{H}_{2}}OH $ convert into $ C{{H}_{3}}CHO $ in the presence of:

• A. $ N{{a}_{2}}C{{r}_{2}}{{O}_{7}} $ and $ NaOH $
• B. $ N{{a}_{2}}C{{r}_{2}}{{O}_{7}} $ and dil. $ {{H}_{2}}S{{O}_{4}} $
• C. $ NaOH $
• D. Fe in presence of $ NaOH $

Answer 1

Answer: (B)

$1^{\circ}$ alcohol are converted into aldehyde by reaction with $Na _{2} Cr _{2} O _{7}$ and $H _{2} SO _{4}$
$\underset{\text{ethyl alcohol}}{CH _{3} CH _{2} OH} +[ O ] \ce{->[{ Na _{2} Cr _{2} O _{2}+ H _{2} SO _{4}}]}\underset{\text{ethanal}}{CH _{3} CHO} + H _{2} O$