Aldehyde ketones & carboxylic Acid MCQs for NEET — Chemistry Questions with Answers

(d) C₆H₅CHO $\stackrel{{\mathrm{Cl}}_2}{\to }$ C₆H₅COCl

(b) 2CH₃COCl+R₂Cd $\to$2CH₃COR+CdCl₂

(c) >C$=$O $\leftrightarrow$>$\stackrel{+}{\mathrm{C}}-\stackrel{-}{\mathrm{O}}$ the +ve IE of alkyl groups decreases +ve charge on C⁺ centre more effectively in ketones. Also, steric hindrance caused by bulky groups for nucleophiles to attack C⁺ centre.

(c) Follow mechanism of Cannizzaro's reactioin.

Pinacol or 2,3-dimethyl-2,3-butanediol is an organic compound with the formula (CH₃)₂C(OH)C(OH)(CH₃)₂. It is a diol, a compound containing two hydroxyl groups, and is a reduction product of acetone.

(d) These reactions lead to replacement of oxygen atom of carbonyl group to form hydrazones and oximes.

(b) Benedicts solution contains CuSO₄, sodium citrate and sodium carbonate.

(b) Unlike KMnO₄ acid Jone's reagent (K₂Cr₂O₇ + H₂SO₄) does not attack C=C.

(b) ${\mathrm{CH}}_3\mathrm{CHO}\stackrel{{\left({\mathrm{C}}_2{\mathrm{H}}_5\mathrm{O}\right)}_3\mathrm{Al}}{\to }{\mathrm{CH}}_3{\mathrm{COOCH}}_2.{\mathrm{CH}}_3$

This is Tischenko's reaction.