An alcohol and an ether have the same molecular formula, C2H6O. These two compounds have

A) the same functional group and the same physical and chemical properties

B) the same functional group and different physical and chemical properties

C) different functional groups and the same physical and chemical properties

D) different functional groups and different physical and chemical properties

D. Different functional groups and different physical and chemical properties

Explanation:

A functional group is an atom or group of atoms within a molecule that determines the chemical and physical properties of the compounds it appears in.

The functional group of an alcohol is the - OH group while that of an ether is an oxygen atom bonded to two alkyl or aryl groups, R-O-R'.

Based on the above;

Option A is wrong because they have different functional groups, hence different properties

Option B is wrong because they don't have same functional group even though their properties are different

Option C is wrong because they have different properties even though they have different functional groups

Option D is correct because they have different functional groups and different properties.