Chemical Reactions of Alkynes

When propyne is treated with aqueous ${\text{H}}_2\text{S}{\text{O}}_4$ in presence of $\text{H}\text{g}\text{S}{\text{O}}_4$, the major product is:

The product(s) obtained via hydration $({\mathrm{HgSO}}_4+{\mathrm{H}}_2{\mathrm{SO}}_4)$ of 1-butyne would be:

The number of possible structural and configurational isomers of a bromo compound, formed by the addition of 1 mole of HBr to 2-pentyne respectively, are –

How many reagents from the list below give effervescence when reacted with $1-\mathrm{pentyne}$?

$$\begin{gathered} \mathrm{NaOH}\left(\mathrm{I}\right), {\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{ONa}\left(\mathrm{II}\right), {\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{MgBr}\left(\mathrm{III}\right), \\ \mathrm{NaH}\left(\mathrm{IV}\right), {\mathrm{NaNH}}_2\left(\mathrm{V}\right), \mathrm{Na}\left(\mathrm{VI}\right), {\mathrm{NaHCO}}_3\left(\mathrm{VII}\right), \\ {\left[({\mathrm{CH}}_3{)}_2\mathrm{CH}\right]}_2\mathrm{NLi}\left(\mathrm{VIII}\right), {\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Li}\left(\mathrm{IX}\right), {\mathrm{C}}_6{\mathrm{H}}_5\mathrm{Li}\left(\mathrm{X}\right) \end{gathered}$$

The total number structural isomers of alkynes that on catalytic reduction gives $3-$ethyl$-4-$methylheptane are:

Match the following? 

Polymerisation product of propyne is

Thin films of polyacetylene can be used as

${\mathrm{The\; treatment\; of\; CH}}_3\mathrm{MgX\; with }{\text{CH}}_3\text{C}\equiv \text{C}-\text{H produces}$

Identify $A$ and $B$ in the given reaction

A hydrocarbon $\mathrm{X}$ with molecular formula ${\mathrm{C}}_4{\mathrm{H}}_6$ decolorizes bromine water and forms a white  precipitate in ethanolic ${\mathrm{AgNO}}_3$ solution Treatment of $\mathrm{X}$ with ${\mathrm{HgCl}}_2$ in aqueous ${\mathrm{H}}_2{\mathrm{SO}}_4$ produces a compound, which gives a yellow precipitate when treated with ${\mathrm{I}}_2$ and $\mathrm{NaOH}$. The structure of $\mathrm{X}$ is :

The following conversion can be carried out by

 

An organic compound X with molecular formula ${\mathrm{C}}_6{\mathrm{H}}_{10},$ when treated with $\mathrm{HBr},$  forms a gem dibromide. The compound X upon warming with ${\mathrm{HgSO}}_4$ and dil. ${\mathrm{H}}_2{\mathrm{SO}}_4,$  produces a ketone, which gives a positive iodoform test. The compound X is

An alkyne $\mathrm{X}\left({\mathrm{C}}_4{\mathrm{H}}_6\right)$ forms sodium alkynide and when reacted with two molecules of $\mathrm{HBr}$, it gave $\mathrm{Y}.$ What are $\mathrm{X}$ and $\mathrm{Y}?$

$\mathrm{A}$ and $\mathrm{B}$ are ?

Select reaction(s) which will favour in the forward direction:

The reagent which can be used to  differentiate  $\mathrm{But}-1-\mathrm{yne}$ and $\mathrm{pent}-2-\mathrm{yne}$ is

What will be the major product obtained in the given reaction:

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3\underset{{\mathrm{Hg}}^{2+}}{\overset{{\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}}{\to }}$ Product
 

Choose the correct statement for the following reaction.