Identify the reagent that confirms the presence of five $-OH$ groups in glucose.

Given below are two statements :
Statement $I :$ $D$-glucose pentaacetate does not react with $2,4$-dinitrophenylhydrazine.
Statement $II :$ Starch,on heating with dilute sulfuric acid at $393 \ K$ and $2-3 \ \text{atmosphere}$ pressure,produces glucose.
In the light of the above statements,choose the correct answer from the options given below.

The correct corresponding names of the four aldoses with the configurations given below,respectively,are:

What is the value of specific rotation exhibited by the fructose molecule?

What is invert sugar?

Glucose does not react with