Question

Water interacts with polar substances like –OH groups but not with non-polar substances like methyl (-CH3) or ethyl groups (-CH2). Using this information, select the molecules that will easily dissolve in water based on polarity not on size. Check all that apply.
CH4
CH3OH
CH3 CH3
CH3 CH2 CH2 OH
CH3 CH2 CH2 CH2 CH2 CH3

Answer 1

To answer this, we look at the polarities of these molecules given. A molecule is said to be polar when there is an unequal shraing of electrons the opposite is called nonpolar.
CH4 = nonpolar
CH3OH = polar
CH3 CH3 = nonpolar
CH3 CH2 CH2 OH = polar
CH3 CH2 CH2 CH2 CH2 CH3 = nonpolar