MCQ
The compound which will give negative iodoform test is
  • A
    $C{H_3}CHO$
  • B
    $C{H_3}C{H_2}OH$
  • C
    Isopropyl alcohol
  • Benzyl alcohol

Answer

Correct option: D.
Benzyl alcohol
d
$\left. \begin{gathered}
  C{H_3}CHO\,\,\,\xrightarrow{{NaOH/{I_2}}}\;\;CH{I_3} \hfill \\
  C{H_3}C{H_2}OH\,\,\,\xrightarrow{{NaOH/{I_2}}}\;\;CH{I_3} \hfill \\
  C{H_3} - \mathop {\mathop {CH}\limits_{|\,\,\,\,\,} }\limits_{OH}  - C{H_3}\;\xrightarrow{{NaOH/{I_2}}}\;CH{I_3} \hfill \\ 
\end{gathered}  \right\}\,\,Yellow\,\,ppt.$

${C_6}{H_5} - C{H_2} - OH\xrightarrow{{NaOH/{I_2}}}{\text{No}}\,\,{\text{yellow}}\,\,ppt.$

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

Similar questions

The solution in which the blood cells retain their normal form are with regard to the blood
$3 \;g$ of acetic acid is added to $250\; \mathrm{mL}$ of $0.1\; \mathrm{M} \mathrm{HCl}$ and the solution made up to $500\; \mathrm{mL}$ To $20 \;\mathrm{mL}$ of this solution $\frac{1}{2}\; \mathrm{mL}$ of $5\; \mathrm{M\;NaOH}$ is added. The $\mathrm{pH}$ of the solution is [Given : $\mathrm{pK}_{\mathrm{a}}$ of acetic acid $=4.75,$ molar mass of acetic acid $=60 \mathrm{g} / \mathrm{mol}, \log 3=0.4771]$

Neglect any changes in volume

The heat change for the following reaction $C(s) + 2S(s) \to C{S_2}(l)$ is known as
In which of the following species is the underlined carbon having $s{p^3}$ hybridisation
What is the debroglie wavelength of electron, in hydrogen atom, moving in an orbit having maximum magnetic quantum no. $ = +2$ $\mathop {\rm{A}}\limits^{\rm{o}} $
Dissolving $120\, g$ of a compound (mol. wt. $60$) in $1000\, g$ of water gave a solution of density $1.12\, g/mL$. The molarity of the solution is ............ $\mathrm{M}$
Which of the following species has the highest electron affinity
In which of the compounds given below is there more than one kind of hybridisation $(sp,{\rm{ }}s{p^2},{\rm{ }}s{p^3})$ for carbon

$(i)$ $C{H_3}C{H_2}C{H_2}C{H_3}$

$(ii)$ $C{H_3} - CH = CH - C{H_3}$

$(iii)$ $C{H_2} = CH - CH = C{H_2}$

$(iv)$ $H - C \equiv C - H$

$C _{6} H _{6}$ freezes at $5.5^{\circ} C$. The temperature at which a solution $10\, g$ of $C _{4} H _{10}$ in $200\, g$ of $C _{6} H _{6}$ freeze is ...... ${ }^{\circ} C$. (The molal freezing point depression constant of $C _{6} H _{6}$ is $5.12\,{ }^{\circ} C / m .$ )
If monosaccharide contains an aldehyde group, it is known as