Water can be separated into hydrogen and oxygen gas via electrolysis in the following equation. 2H20 -> 2H2 +O2 What type of reaction is this.

D: Decomposition Reaction

Explanation:

A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances.

The general form of a decomposition reaction is: AB -> A+B.

You just split the nonmetals into a molecule depending on the element.

But they are rules though when doing this reaction. If a element is a diatomic molecule, then you would write a 2 in the subscript.

Diatomic molecules contain two atoms that are chemically bonded

Now let us go back to this problem: 2H2O -> 2H2 + O2

So water or 2H2O split into 2H2 and O2 because hydrogen and oxygen are diatomic elements.

That is how you write the product of a decomposition reaction.

Hope it helped!

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.