How can you say that glucose is a cyclic comp | vedclass

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(C) Despite having an aldehyde group,glucose does not give the $2,4-DNP$ test or Schiff's test.Furthermore,it does not form a hydrogen sulphite additi

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Glucose fails to react with sodium hydrogen sulphite

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(C) Despite having an aldehyde group,glucose does not give the $2,4-DNP$ test or Schiff's test.Furthermore,it does not form a hydrogen sulphite addition product with $NaHSO_3$.These observations indicate that the aldehyde group is not free but is involved in the formation of a hemiacetal structure,confirming that glucose exists as a cyclic compound.

How can you say that glucose is a cyclic compound?

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