Question

Which is parent chain and how to number them.

Answer 1

Answer:

we should number the chain as per the high number of carbon atoms.which chain has more number of carbon atoms it should be considered as the parent chain

Answer 2

Answer:

ANSWER IS 5

ACCORDING TO PRIORITY COOH MUST BE NUMBERED FIRST

ALL OTHER FUNCTIONAL GROUPS BECOME SUBSTITUENTS

THUS CHO(ALDEHYDE) BECOMES A SUBSTITUENT, WHICH MEANS IT SHOULD NOT BE INCLUDED IN MAIN CHAIN

SO THE PARENT CHAIN IS

C-COOH

II

C-CH2-CH3

HOPE IT HELPS!