Question

The chemical formula of starch is
A. $$(C_6{H}_{10}{O}_5)n$$
B. $$(C_6{H}_{12}{O}_6)n$$
C. $$C_{12}{H}_{22}{O}_{11}$$
D. $$C{H}_{3}COOH$$

Answer 1

Hint: Starch is a polymeric carbohydrate chemically made up of glucose units joined by glycosidic bonds. Starch is produced by almost all green plants in the form of energy for storage. Starch is the form of carbohydrates which is present in human diet like potatoes, maize, rice, wheat and cassava.

Complete Answer:
Physical appearance of pure starch is white in color, tasteless and odorless powder and insoluble in cold water or alcohol.
It is made of two types of molecules: the linear and helical amylose and the branched amylopectin.
Starch contains 20 to $$25\mathrm{\%}$$ amylase and 75 to $$80\mathrm{\%}$$ amylopectin.
Animals store glucose as glycogen.
Basically Starch is a polysaccharide formed by glucose monomers which are came together by the $\alpha 1,4$ linkages so the basic chemical formula of the starch molecule is $$(C_6{H}_{10}{O}_5)n$$.

So, the correct answer is $$(C_6{H}_{10}{O}_5)n$$.

Note: There are various applications of starch: In industry starch is used for manufacturing of beer, whisky and biofuel in the form of sugar.
- After converting into sugar it is used in processed food.
- It is used as a thickening agent.
- It is also used in paper making processes as adhesive.
- The Occupational Safety and Health Administration (OSHA) has set the legal limit that is Permissible exposure limit for starch exposure in the workplace as $$15mg/m^3$$ total exposure and $$5mg/m^3$$ respiratory exposure over an 8-hour workday.