Of the $5$ isomeric hexanes,the isomer which can give $2$ monochlorinated compounds is

What is the difference in molar masses of the third and fourth homologues of the alkane series?

Which of the following reagents is used for the following reaction?
$CH_{3}CH_{2}CH_{3} \stackrel{?}{\longrightarrow} CH_{3}CH_{2}CHO$

$Ph^{-}MgBr + CH_3-CH(OH)-CH_3 \to A$. What is the product $A$?

The alkane which is next to methane in the homologous series can be prepared from which of the following reactions?
$I$. $2 CH_3 Br \xrightarrow[\text{dry ether}]{Na}$
$II$. $CH_3 COOH \xrightarrow[CaO, \Delta]{NaOH}$
$III$. $CH_3 CH=CH_2 \xrightarrow{H_2 / Pt}$
$IV$. $CH_3 CH_2 Br \xrightarrow[H^{+}]{Zn}$
Correct answer is

Cetane is a compound which has very good ignition property. Chemically it is