Which of the following statements is correct?

Question:
Which of the following statements is correct?

Gluconic acid can form cyclic (acetal/hemiacetal) structure
Gluconic acid is a dicarboxylic acid
Gluconic acid is a partial oxidation product of glucose
Gluconic acid is obtained by oxidation of glucose with $\mathrm{HNO}_{3}$

Correct Option: , 3

Solution:

Gluconic acid is obtained by partial oxidation of glucose by mild oxidising agent e.g. Tollen's reagent, Fehling solution, $\mathrm{Br}_{2}$ water.

Gluconic acid can not form hemiacetal or acetal.

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