Question

In the alkane $H_3C-CH_2-C(CH_3)_2-CH_2-CH(CH_3)_2$ , identify 1°,2°,3° carbon atoms and give the number of H atoms bonded to each one of these.

Answer 1

$1\degree$ carbon atoms are those which are bonded to only one carbon atom, i.e., they have only one carbon atom as their neighbour. The given structure has five $1\degree$ carbon atoms and fifteen hydrogen atoms are attached to it.
$2\degree$ carbon atoms are those which are bonded to two carbon atoms, i.e., they have two carbon atoms as their neighbours. The given structure has two $2\degree$ carbon atoms and four hydrogen atoms are attached to it.
$3\degree$ carbon atoms are those which are bonded to three carbon atoms, i.e., they have three carbon atoms as their neighbours. The given structure has one $3\degree$ carbon atom and only one hydrogen atom is attached to it.