Arrange the compounds in order of decreasing solubility in water. a) 1-butanthiol b) 1-butanol c) 1,2-propanediol Answer by ordering the letters a-c as a string, e. g. acb, starting with the compound of highest solubility. The order of decreasing solubility is

cba

Explanation:

Alcohols are soluble in water because of the presence of the -OH group which interacts with water by hydrogen bonding leading to the miscibility of low molecular weight alcohols with water.

The solubility of alcohols in water decreases as the length of the alkyl chain increases. Similarly, the more the number of -OH groups present, the greater the solubility bof the alcohol in water.

1-butanol contains less -OH groups than 1,2-propanediol as well as a longer alkyl chain hence 1-butanol is less soluble in water than 1,2-propanediol. Butanthiol has the least solubility in water because the -SH group forms weaker hydrogen bonds than the -OH group.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.