$A$ hydrocarbon $C_5H_8$ consumes two moles of hydrogen. On ozonolysis,it produces $2-$oxopropanal and methanal. The hydrocarbon is:

Arrange the following in the correct order of their acidic strength:

$I. H_2C=CH_2$

$II. CH \equiv CH$

$III. CH_3-C \equiv CH$

$IV. CH_3-CH_3$

What is the major product of the following $E2$ reaction?

Which of the following is not used to distinguish ethene from ethane?

$A$ molecule $P$ on treatment with acid undergoes rearrangement and gives $Q$. $Q$ on ozonolysis followed by reflux under alkaline condition gives $R$. The structure of $R$ is given below:
[Image of $R$]
The structure of $P$ is

Compound $(X)$ will be:
Compound $(X) \xrightarrow[Pt]{5H_2} \text{Saturated compound}$
Compound $(X) \xrightarrow{AgNO_3} \text{Precipitate}$
Compound $(X) \xrightarrow[Me_2S]{O_3} OHC-CH_2-CH_2-CO-CHO + HOOC-CHO + HCOOH + OHC-CHO$