The reagents with which glucose does not react to give the corresponding test/products are:
A. Tollen's reagen

Question

The reagents with which glucose does not react to give the corresponding test/products are:
A. Tollen's reagent
B. Schiff's reagent
C. $	ext{HCN}$
D. $	ext{NH}_2	ext{OH}$
E. $	ext{NaHSO}_3$

Choose the correct option:

Accepted Answer

Despite having an aldehyde group, glucose does not give the 2,4-DNP test, Schiff's test, and it does not form the hydrogensulphite addition product with $	ext{NaHSO}_3$. This anomalous behaviour is because glucose exists primarily in its cyclic hemiacetal form, rendering the free aldehyde group unavailable for these specific reactions. However, it does react with Tollen's reagent, $	ext{HCN}$, and $	ext{NH}_2	ext{OH}$. Therefore, the reagents it does not react with are Schiff's reagent (B) and $	ext{NaHSO}_3$ (E).

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