Asolution of starch at room temperature does not readily decompose to form a solution of simple sugars because

a) solution of starch at room temperature does not readily decompose to form a solution of simple sugars because starch hydrolysis is nonspontaneous.
b) the starch solution has less free energy than the sugar solution.
c) the hydrolysis of starch to sugar is endergonic.
d) starch cannot be hydrolyzed in the presence of so much water.
e) the activation energy barrier for this reaction cannot easily be surmounted at room temperature.

E = The activation energy barrier for this reaction can not easily be surmounted.

Explanation:

Starch:

Starch is a polymeric carbohydrate consist of various glucose units join together through glycosidic bonds.

Reason why it is not dissolve at room temperature:

When starch is added into water it form granules with cold water and can be soluble by heating.

At a room temperature the starch does not readily decompose to from the solution by decomposing into simple sugar because the activation energy barrier for this reaction can not easily be surmounted at a room temperature.

Option E is the correct. The activation energy barrier for starch hydrolysis cannot easily be surmounted at room temperature

Activation Energy:

It is the minimum amount of energy that is required to start a chemical reaction. The activation energy of starch hydrolysis can be achieved at this is above room temperature.

The hydrolysis reactions are breakdown reactions and are spontaneous and exergonic.

Hence, option A, B, C, and D can be eliminated.

Therefore we can conclude that the activation energy barrier for starch hydrolysis cannot easily be surmounted at room temperature.

To know more about Activation energy, refer to the link:

link

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separate your answers so i dont get confused : )