In laboratory burners,we use

Which of the following reactions are not feasible?
$I$. $CH_3CH=CH_2 \xrightarrow{HCl, (C_6H_5CO)_2O_2} CH_3CH_2CH_2Cl$
$II$. $C_6H_6 + CH_3CH_2CH_2Cl \xrightarrow{AlCl_3} C_6H_5CH(CH_3)_2$
$III$. $CH_3CHClCH_2Cl \xrightarrow{KOH, \Delta} CH_3C \equiv CH$
$IV$. $CH_3CH=CHCH_3 \xrightarrow{KMnO_4 / H^+} CH_3COOH$

Classify the following compounds into saturated,unsaturated,and aromatic hydrocarbons: Ethane,Ethene,Ethyne,Propene,Propane,Benzene,Toluene,Anthracene,Cyclopropane.

Arrange the following compounds in decreasing order of acidic character of $C-H$ bonds.
$CH_2=CH_2, CH_3-CH_3, C_6H_6, CH\equiv CH$

Among the following pairs,in which case does the second compound have a higher heat of hydrogenation?

$Ph-C \equiv C-CH_3 \xrightarrow{Hg^{2+}/H^{+}} A$. $A$ is