Is there a multiple choice or a written answer??
Answer:
Cyclic butanol , 1 cyclopropyl methanol, 1-methyl cyclo propan-1-ol.
Explanation:
IR wave-number of O-H bond = 
The intensity of the signal is broad and strong.
IR wave number of C=C bond = 
The intensity of the signal is weak.But for the given chemical formula it didn't show any signal in its IR spectrum.This means that no unsaturation is present.
IR wave number of C=O bond = 
The intensity of the signal is broad and strong.But for the given chemical formula it didn't show any signal in its IR spectrum. This means that no C=O is present in the compound
For the given formula the possible structures wil be:

As we know from the I.R. data that no unsaturation is present which indicates that the given compound has cyclic structure.
The possible structures are attached in an image.
5+4=9
Your final answer is 9g
Melting is a process involving absorption of energy which means that it is endothermic.
Answer:
3-ethyl-4-methyl Heptane
Explanation:
longest chain is straight .
we start assigning number from where we are close to the branch to this mean its from left hand side. and we saw two chain 1 is ethyl and other is methyl . In alphabetical order e comes first as compare to m so we write ethyl first after that methyl and than in last we write longest chain name with ane (bcz we only have single vonds).