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NEET
Exam
NEET
Subject
Chemistry
Chapter
Carboxylic Acid Derivatives

NEET · Chemistry · Carboxylic Acid Derivatives

Match the column ( Column-I (Transformations) Column-II (Reagents)...

Match the column (
Column-I (Transformations)Column-II (Reagents)
(a)Allyl alcohol to propenal(p)K_2 Cr_2 O_7 / H^{\oplus}
(b)Ethane nitrile to ethanal(q)O_3 / H_2 O-Zn dust
(c)1-hexanol to hexanoic acid(r)PCC
(d)2-Butene to ethanal(s)DIBAL-H
)

Options

  1. Aa=p,b=s,c=r,d=qa=p, b=s, c=r, d=q
  2. B(a=r\mathrm{a}=\mathrm{r}, b=p\mathrm{b}=\mathrm{p}, c=s\mathrm{c}=\mathrm{s}, d=q\mathrm{d}=\mathrm{q})
  3. C(a=r\mathrm{a}=\mathrm{r}, b=s\mathrm{b}=\mathrm{s}, c=p\mathrm{c}=\mathrm{p}, d=q\mathrm{d}=\mathrm{q})
  4. D(a=s\mathrm{a}=\mathrm{s}, b=p\mathrm{b}=\mathrm{p}, c=q\mathrm{c}=\mathrm{q}, d=r\mathrm{d}=\mathrm{r})

Correct answer

C. (a=r\mathrm{a}=\mathrm{r}, b=s\mathrm{b}=\mathrm{s}, c=p\mathrm{c}=\mathrm{p}, d=q\mathrm{d}=\mathrm{q})

Step-by-step solution

- (a) Allyl alcohol (\rightarrow) propenal (\rightarrow(\mathrm{r})) PCC PCC oxidizes a (1^{\circ}) alcohol to an aldehyde without over-oxidation. - (b) Ethanenitrile (\rightarrow) ethanal (\rightarrow) (s) DIBAL-H DIBAL-H partially reduces nitriles to aldehydes. - (c) 1-Hexanol (\rightarrow) hexanoic acid (\rightarrow) (p) (\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7 / \mathrm{H}^{+}) Strong oxidation of a (1^{\circ}) alcohol to a carboxylic acid. - (d) 2-Butene (\rightarrow) ethanal (\rightarrow) (q) (\mathrm{O}_3 / \mathrm{H}_2 \mathrm{O}-\mathrm{Zn}) (ozonolysis) Reductive workup gives aldehydes.
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