Problem

starch

\xrightarrow[\text{dilute hydrochloric acid}]{}

monosaccharide A

\xrightarrow[\text{yeast, } 37^\circ\text{C}]{}

liquid B + carbon dioxide liquid B

\xrightarrow[\text{heat + potassium dichromate(vi)}]{} \text{liquid C} + \text{water}

liquid C

\xrightarrow[\text{liquid B, concentrated sulfuric acid}]{} \text{liquid D} + \text{water}

a. Name and give the formula and one use of each of the substances A to D. b. Write word and balanced chemical equations for the reactions involved in the formation of liquids B, C and D. c. Starch is classified as a natural polymer or 'biopolymer'. Explain the meaning of this statement. d. Name the processes by which: - starch is broken down - liquid B is formed - liquid C is formed - liquid D is formed.

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