MCQ
The reagent which could distinguish between $1-$ hexyne and $1-$ hexene is 
  • Tollen's reagent
  • B
    Baeyer's reagent
  • C
    Bromine water test
  • D
    All

Answer

Correct option: A.
Tollen's reagent
a
$Ag \left( NH _3\right)_2^{+}$is called Tollen's reagent.

It reacts with terminal alkynes ($1-$hexyne) but not with alkenes ($1-$hexene).

$CH \equiv CCH _2 CH _2 CH _3+ Ag \left( NH _3\right)_2^{+} \rightarrow CH _3 CH _2 CH _2 C \equiv C - Ag + NH _4 OH$

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Similar questions

A carbonyl compound ${P}$, which gives positive iodoform test, undergoes reaction with $\mathrm{MeMgBr}$ followed by dehydration to give an olefin ${Q}$. Ozonolysis of ${Q}$ leads to a dicarbonyl compound ${R}$, which undergoes intramolecular aldol reaction to give predominantly ${S}$.

${P} \xrightarrow[\substack{\text { 2. } \mathrm{H}^{+}, \mathrm{H}_2 \mathrm{O} \\ \text { 3. } \mathrm{H}_2 \mathrm{SO}_4, \Delta}]{\text { 1. MeMgBr }}Q \xrightarrow[\text { 2. } \mathrm{Zn}, \mathrm{H}_2 \mathrm{O}]{1 . \mathrm{O}_3} {R} \xrightarrow[\text { 2. } \Delta]{1 . \mathrm{OH}^{-}} {S}$

$1.$ The structure of the carbonyl compound ${P}$ is

$Image$

$2.$ The structures of the products ${Q}$ and ${R}$, respectively, are

$Image$

$3.$ The structure of the product ${S}$ is

$Image$

Give hte answer question $1,2$ and $3.$

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