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Chemistry · 2022 · 3 marks
Aldehydes, Ketones and Carboxylic AcidsChemical Reactions of Aldehydes, Ketones and Carboxylic Acids3 marksAnalyseshort answer
CBSE 2022 · Region 1 · Set 1 · Q9
An organic compound 'X' with the molecular formula C_5 H_10 O forms 2,4-DNP derivative, does not reduce Tollens' reagent but gives positive iodoform…
An organic compound 'X' with the molecular formula $\displaystyle \mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}$ forms $\displaystyle 2,4$-DNP derivative, does not reduce Tollens' reagent but gives positive iodoform test on heating with $\displaystyle \mathrm{I}_{2}$ in the presence of NaOH. Compound 'X' gives ethanoic acid and propanoic acid on vigorous oxidation. Write the
(i)
Structure of the compound 'X'.
(ii)
Structure of the product obtained when compound 'X' reacts with $\displaystyle 2,4$-DNP reagent.
(iii)
Structures of the products obtained when compound 'X' is heated with $\displaystyle \mathrm{I}_{2}$ in the presence of NaOH .
Marking-scheme solution
(i)
/ Pentan-$\displaystyle 2$-one
(ii)
$\displaystyle +$ $\displaystyle \longrightarrow$
(Product)
(iii)
$\displaystyle \mathrm{CH_3-CH_2CH_2COONa} + \mathrm{CHI_3}$
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