Question

"A sugar can have ...

(a) H covalently bound to the C of a C=O group.
(b) a C atom that is covalently bound to three H atoms.
(c) the formula C5H8O5.
(D) Both (a) and (c).
(e) Both (b) and (c)."

Answer 1

A sugar can have a hydrogen atom covalently bound to the carbon of a C=O group and can also have the formula C5H8O5, which is ribose, a monosaccharide.

Step-by-step explanation:

A sugar molecule can have various structural characteristics.

Firstly, it can have a hydrogen (H) atom covalently bound to the carbon (C) of a carbonyl group (C=O), as seen in aldehydes and ketones which are present in monosaccharides.

Secondly, a carbon atom within a sugar molecule cannot be covalently bound to three hydrogen atoms because in carbohydrates, each carbon is typically part of a hydroxyl group or linked to another carbon or oxygen.

Lastly, the formula C5H8O5 represents a monosaccharide, ribose, which is a component of RNA.

Therefore, options (a) and (c) are correct, meaning a sugar can have H covalently bound to the C of a C=O group and can have the formula C5H8O5.