Asingle atom of oxygen cannot be subdivided into simpler substances by any physical or chemical means. therefore, it is:
select one:
a. a molecule
b. a compound
c. a mixture
d. an element

which mixture has the largest particle size?
select one:
a. solution
b. colloid
c. compound
d. suspension

which substance cannot be decomposed into simpler substance(s)?
select one:
a. iodine
b. alcohol
c. methane
d. ethanol

which of the following is not an example of a compound? a substance comprised of:
a. atoms of the same element
b. atoms of two different elements

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.