Download App

8.2 Carboxylic acids and their derivative — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry8.2 Carboxylic acids and their derivative1 Mark
MCQ
${C_6}{H_5}CONHC{H_3}$ can be converted into ${C_6}{H_5}C{H_2}NHC{H_3}$ by
  • A
    $NaB{H_4}$
  • B
    ${H_2} - Pd/C$
  • C
    $LiAl{H_4}$
  • ✓
    $Zn - Hg/HCl$
✓

Answer

Correct option: D.
$Zn - Hg/HCl$
d
${C_6}{H_5}CONHC{H_3} \,\mathop {\xrightarrow{{Zn - Hg/}}}\limits_{HCl} \,{C_6}{H_5}C{H_2}NHC{H_3}$

This reaction is known as Clemmenson reduction.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 8.2 Carboxylic acids and their derivative→8.2 Carboxylic acids and their derivative — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

$1.80\,g$ of solute $A$ was dissolved in $62.5\,cm ^{3}$ of ethanol and freezing point of the solution was found to be $155.1\,K$. The molar mass of solute $A$ is $..........g\,\,mol ^{-1}$.

[Given: Freezing point of ethanol is $156.0 K$ Density of ethanol is $0.80\,g\,cm ^{-3}$.

Freezing point depression constant of ethanol is $\left.2.00\,K\,kg\,mol\,m ^{-1}\right]$

→
Acetyl chloride does not react with
→
When primary alcohol is oxidised with chlorine, it produces
→
When acetaldehyde is heated with Fehling solution, it gives a red precipitate of 
→
Assertion : Solution of $Na_2CrO_4$ in water is intensely coloured.

Reason : Oxidation state of $Cr$ in $Na_2CrO_4$ is $+VI$

→
In the following sequence of reactions

$C{H_3}C{H_2}OH\xrightarrow{{P + {I_2}}}A\xrightarrow[{Ether}]{{Mg}}B $ $\xrightarrow{{HCHO}}C\xrightarrow{{{H_2}O}}D,$

then compound $'D'$ is -

→
The aqueous solution of transition metal salt changes colour from pink to blue, when concentrated hydrochloric acid is added to it. The change In colour is due to
→
The relation between faraday constant $F$, electron charge $e$ and avogadro number $N$ is
→
Considering acetic acid dissociates in water, its dissociation constant is $6.25 \times 10^{-5}$. If $5 \mathrm{~mL}$ of acetic acid is dissolved in $1$ litre water, the solution will freeze at $-\mathrm{x} \times 10^{-2}{ }^{\circ} \mathrm{C}$, provided pure water freezes at $0^{\circ} \mathrm{C}$.

$\mathrm{x}=$ . . . . . . . . . (Nearest integer)

Given : $\left(\mathrm{K}_{\mathrm{r}}\right)_{\text {water }}=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$.

density of acetic acid is $1.2 \mathrm{~g} \mathrm{~mol}^{-1}$

molar mass of water $=18 \mathrm{~g} \mathrm{~mol}^{-1}$.

molar mass of acetic acid $=60 \mathrm{~g} \mathrm{~mol}^{-1}$.

density of water $=1 \mathrm{~g} \mathrm{~cm}^{-3}$

Acetic acid dissociates as

$\mathrm{CH}_3 \mathrm{COOH} \rightleftharpoons \mathrm{CH}_3 \mathrm{COO}^{\oplus}+\mathrm{H}^{\oplus}$

→
The secondary battery is such a battery:
→