text: Pooja, you are baiscally on the right track. You choose the longsest chain. It can sometimes get tricky to choose the longset and there is where organic chem can get a little tricky.\n\nOnce you have identfied the longest chain, you need to see how much H "connection" are there.\n\nThe next step is to see the relationship between H and C.\n\nIf it is a 1 to 1 relationship, you have to keep in mind certain implications.\n\nIf however, C is more than H you need to know that you are dealing with heavy compounds and this as I'm sur you nkow, needs to be dealt with diffrently.