Question

A hydrocarbon has the molar mass 86. The number of chain isomers possible for the compound is :

• A. five
• B. six
• C. four
• D. ten

Answer 1

The correct option is A five

$A=1)\stackrel{1}{C{H}_3}-\stackrel{2}{C{H}_2}-\stackrel{3}{C{H}_2}-\stackrel{4}{C{H}_2}-\stackrel{5}{C{H}_2}-\stackrel{6}{C{H}_3}$

$2)\underset{1}{C{H}_3}-\stackrel{C{H}_3}{\stackrel{|}{\underset{2}{C{H}_2}}}-\underset{3}{C{H}_2}-\underset{4}{C{H}_2}-\underset{5}{C{H}_3}$

$3)C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{CH}}}}-C{H}_2-C{H}_3$

$4)C{H}_3-C-\stackrel{C{H}_3}{\stackrel{|}{\underset{C{H}_{2}C{H}_3}{\underset{|}{C}}}}-C{H}_3$

$5)\stackrel{C_2{H}_5}{\stackrel{|}{H_{2}C}}-C-\stackrel{C_2{H}_5}{\stackrel{|}{H_2}}$

Mal .Mass = $8$6

Max of $6$ oorbon

So $C_6{H}_{14}$

Somers of $C_6{H}_{14}$