Question

Question 13.14 In the alkane H3C–CH2–C(CH3)2–CH2–CH(CH3)2, identify 1°,2°,3° carbon atoms and give the number of H atoms bonded to each one of these.

Class XI Hydrocarbons Page 397

Answer 1

concept :- The carbon which is attached with only 1 or no other carbon atom , is known as 1° Carbon . similarly , carbon attached with 2, 3, or 4 other carbon atoms is known as 2°, 3° or 4° carbon atoms respectively.

see pic , here it is clear that,
15H - bonded to five 1°C - atoms .
4H- bonded to two 2°C- atoms .
1H - bonded to one 3°C - atoms.