Glucose (C₆H₁₂O₆) Can Exist as Both an Open-Chain Form and a Closed-Ring

question 52

Multiple Choice

Glucose (C₆H₁₂O₆) can exist as both an open-chain form and a closed-ring form. Before 1900, glucose was only thought to occur as an open chain. Now we know that over 99 percent of the time, glucose occurs in the closed-ring form. What possible difference between these forms would give chemists a clue that the open-chain form was not present?

• A) Open-chain molecules can form polymers and glucose does not.
• B) Only open-chain forms can undergo condensation, which does not occur with glucose.
• C) An open chain presents ends with functional groups (in this case aldehyde), and glucose failed to undergo typical aldehyde reactions; a phenomenon that could be explained by having no end functional group in a ring structure.
• D) Because glucose is solid at room temperature, it must have saturated hydrocarbon chains.
• E) Glucose could not be "denatured" so it must be a tight chain.

---

Definitions:

Individualized Marketing

A strategy that involves tailoring marketing efforts to meet the specific needs of each customer.

Clutter

The accumulation of a large number of unnecessary or irrelevant items in a space, leading to a disorderly or overcrowded environment.

Technology

The application of scientific knowledge for practical purposes, especially in industry, to invent tools, devices, and systems enhancing human life.

Evoked Set

The group of brands or products a consumer considers acceptable from among all the brands or products he or she is aware of in a particular category.