Ans. (i) and (iv)
Explanation:
Longest chain with 10 carbons, so rootword is “dec”.
At 5th carbon (2,2-dimethylpropyl) substituent is present.
And it is also said to be neo-pentyl.
The IUPAC names : 5-(2,2-dimethylpropyl)decane or 5-neopentyldecane.
Q-14. Which are the correct IUPAC name of the following compound?
(i) 5-(2',2'-DimethyIpropyl)-decane
(ii) 4-Butyl-2,2-dimethylnonane
(iii) 2,2-Dimethyl-4-pentyloctane
(iv) 5-neo-Pentyldecane