Answer:
4 Ethanol has a boiling point of 89 C at standard pressure.
The present carbon skeleton in an ether is C-C-C-O-C-C-C because ethers conatins C-O-C as functional group
Atomic radii increase when going down a group and decreases when going towards the anion periods. So A and D.
The first compound C6H12 is cyclohexane and the other compound C6H6 is benzene. They are both aromatic compounds. Cyclohexane does not have double bonds in its ring while benzene has three double bonds in its ring. This is why the formula for cyclohexane contains 12 carbon atoms while benzene only has 6.
c is the answer a benzene