Aldehydes are converted to primary alcohols when reacted with a reducing agent. Consider the two D-aldohexoses shown below: When both of them are reduced, one gives a chiral product and the other gives an achiral product. Explain.

The reduction of D-sorbose results in D-gulitol along with another product that has a similar structure but in a different configuration. What is the plausible structure of this second product?

Using Fischer projection, draw and name the product formed when D-altrose is reduced using H₂ with Ni catalyst.

Glycerol is a sweet, colorless, and odorless liquid commonly used as a sweetener in the food industry. Glycerol is the reduced form of aldotriose glyceraldehyde. Draw the structure of glycerol.