Are good conductors of electricity.
lonic
covalent
heterogeneous
gaseous

Option (a) is the correct answer.

Explanation:

A bond where transfer of electrons take place from one atom to another is known as an ionic bond.

An ionic solution is defined as a solution in which an ionic compound is dissociated into ions.

For example, NaCl is an ionic compound and when it is dissolved in water it dissociates as and ions.

As it is known that electric current is the flow of charges. Hence, a solution that contains ions will be a good conductor of electricity.

Whereas in general, a covalent solution does not contain any ions.

Thus, we can conclude that ionic solutions are good conductors of electricity.

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.