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    				| 1. | 5. Minimum number of C-atoms in a three branched alkane is-(4)9(3) 8(2)7 | 
| Answer» 7 is the minimum number of carbon atoms required for three branched alkanes. Explanation:The branches cannot be on the first and last (outermost Carbon atoms) and hence two get three branches two carbon atoms are required to be present between the first and last C-atoms. Hence, the main chain will have 4 C-atoms and 3 chains with one C-Atoms each. | |