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Chemistry · 2023 · 5 marks
CBSE 2023 · Region 1 · Set 2 · Q34
(a) (i) Carry out the following conversions: (1) Ethanal to But-2-en-1-al (2) Propanoic acid to 2-chloropropanoic acid (ii) An alkene with molecular…
(i)
Carry out the following conversions:
(1)
Ethanal to But-$\displaystyle 2$-en-$\displaystyle 1$-al
(2)
Propanoic acid to $\displaystyle 2$-chloropropanoic acid
(ii)
An alkene with molecular formula $\displaystyle \mathrm{C}_{5} \mathrm{H}_{10}$ on ozonolysis gives a mixture of two compounds'B'and'C'. Compound'B'gives positive Fehling test and also reacts with iodine and NaOH solution. Compound'C'does not give Fehling solution test but forms iodoform. Identify the compounds'A', 'B'and'C'.
(i)
Distinguish with a suitable chemical test :
(1)
$\displaystyle \mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}$ and $\displaystyle \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CHO}$
(2)
Ethanal and Ethanoic acid
(ii)
Write the structure of oxime of acetone.
(iii)
Identify A to D.
Marking-scheme solution
(a) (i)
(1) 
(2) 
(ii) 
\(\displaystyle \mathbf{B}=\mathbf{H}_{3} \mathbf{C}-\mathbf{C H O}\) / Ethanal / Acetaldehyde / Propanone / Acetone
All Aldehydes, Ketones and Carboxylic Acids questions2023 question paperNCERT solutions: Aldehydes, Ketones and Carboxylic AcidsPractice Aldehydes, Ketones and Carboxylic Acids →
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