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.

a.) ch4
b.) ch3oh
c.) ch3 ch3
d.) ch3 ch2 ch2 oh
e.) ch3 ch2 ch2 ch2 ch2 ch3

The compounds CH4, CH3 CH3 and CH3CH2CH2CH2CH2CH3, do not have -OH groups linked to C atoms, so they are not polar, and based of the criterium given they will not interact well with water, meaning they will not easily dissolve in water. On the other hand, CH3OH and CH3CH2CH2OH meet the criterium of polarity (they contain the group -OH) so these two substances (alcohols) will easily dissolve in water. So you have to check the options B. and D.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Ithink the answer is d