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Byju's Answer
Standard XII
Biology
Tests for Carbohydrates
D-mannoseHO-⇌...
Question
D
−
m
a
n
n
o
s
e
H
O
−
⇌
D
−
g
l
u
c
o
s
e
H
O
−
⇌
A
Product
(
A
)
of above reaction is:
A
D
−
f
r
u
c
t
o
s
e
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B
D
−
t
a
l
o
s
e
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C
D
−
i
d
o
s
e
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D
D
−
g
l
u
c
o
s
e
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Solution
The correct option is
C
D
−
f
r
u
c
t
o
s
e
D
−
M
a
n
n
o
s
e
⊖
O
H
⇌
D
−
g
l
u
c
o
s
e
⊖
O
H
⇌
D
−
f
r
u
c
t
o
s
e
.
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Similar questions
Q.
D
−
Glucose and
D
−
fructose both form the same osazone. Which statements are correct about the above reaction?
Q.
D-glucose & D-fructose can be differentiated by :
Q.
Same osazone derivative is obtained in case of D-glucose, D-mannose and D-fructose, due to:
Q.
(+)-Sucrose has a specific rotation of +66.5, while D-(+)-glucose and D-(-)-fructose have specific rotations of +52.5 and -92.4 respectively. After complete hydrolysis of (+)-sucrose by dilute acid, what will be the specific rotation of the hydrolysis product, called invert sugar [a 1 : 1 mixture of D-(+)-glucose and D-(-)-fructose] ?
Q.
(+)-Sucrose has a specific rotation of +66.5, while D-(+)-glucose and D-(-)-fructose have specific rotations of +52.5 and -92.4 respectively. After complete hydrolysis of (+)-sucrose by dilute acid, the specific rotation of the hydrolysis product, called invert sugar [a 1 : 1 mixture of D-(+)-glucose and D-(-)-fructose] is
−
x
.
the nearest integer value of
x
is:
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