Class 11

27. ⁠Biomolecules question bank (Chemistry)

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Q1.

In which of the following properties of an open chain structure of glucose could not be explained?

(A)
Glucose contain aldehyde group, but does not give schiff's test
(B)
Glucose does not react with sodium hydrogen sulphite and ammonia
(C)
The pentaacetate of glucose does not react with hydroxy amine indicates absence of –CHO group
(D)
All of these
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Q2.

When glucose was crystallized from a concentrated solution at 30°C & 98°C, it gave α & β form of glucose respectively. What are the angle of rotation \([\alpha]_D\) for both forms?

(A)
(+) 111° & (+) 19.2°
(B)
(+) 19.2° & (–) 111°
(C)
(+) 111° & (–) 19.2°
(D)
(–) 111° & (–) 19.2°
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