What are glucose and mannose to each other?

Glucose and gluconic acid on oxidation with dilute nitric acid $(HNO_3)$ form saccharic acid. This reaction confirms that glucose contains:

The molecular formula of the pentahydroxy acid obtained when glucose is oxidized with $Br_2$ water is:

The given structure is the enol form of:

In which of the following carbohydrates does the molecular mass increase by $84 \ u$ after complete acetylation?

Invert sugar refers to an equimolar mixture of: