question_answer

In which compound the number of 3° carbon is maximum:

A)  2, 5 dimethyl hexane

B)  2, 3, 4-trimethyl pentane

C)  2, 2, 4, 4-tetramethyl pentane

D)  2, 2, 3, trimethyl pentane

Correct Answer: B

Solution :

 Key Idea: Only 1 alkyl group or C is attached to C-atom 2 alkyl group or C are attached to C-atom 3 alkyl group or C are attached to C-atom Draw structure of all compounds and count \[3{{\,}^{o}}C\]atoms [a]   [b]   [c]   [d] 2, 3, 4-trimethyl pentane has highest number of \[{{3}^{o}}\]carbon atoms