Question

Why would you suspect that starch does not easily dissolve in water at room temperature? a....

Why would you suspect that starch does not easily dissolve in water at room temperature?
a. Starch is too large to easily go into solution
b. the starch molecule has no kinetic energy because of its helical shape and therefore cant easily go into solution
c. starch is too hydrophilic to easily go into solution
d. starch is too hydrophobic to easily go into solution
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Answer #1

The right option is option (D) The starch is too hydrophobic to easily go into solution

Explanation :-

A lot of people say that starch is insoluble in water because it has a high molecular weight but that is a wrong explanation. Why? Because molecules larger than Starch are soluble in water. The main reason behind starch solubility is that starch is a granular substance, in which the chains of the starch components are arranged very tightly and they form a crystalline structure due to this arrangement.

This crystalline structure/layer is very hydrophobic and thus it will not interact with the water. This result in the insolubility of starch in water.

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