Question

Which of the following
monosaccharides gives an optically
inactive product on oxidation with
conc., nitric acid?A)D-glucose
B)D-mannose
C)D galactose
D)D-fructose​

Answer 1

Answer:

a is the correct answer of it

Answer 2

Final answer: D-galactose give an optically inactive product on oxidation with concentrated nitric acid. Hence correct option is (C) D-galactose.

Given that: We are given,

(A) D-glucose

(B) D-mannose

(C) D-galactose

D)D-fructose​

To find: We have to find which monosaccharides gives an optically inactive product on oxidation with concentrated nitric acid.

Explanation:

• The property by virtue of which certain substance rotate plane of polarization of plane polarized light is known as optical activity and such substances are said to be optically active.
• Monosaccharide, D-galactose give an optically inactive product on oxidation with concentrated nitric acid. D-galactose on oxidation with $conc. HNO_{3}$, D-galactose gives an optically inactive aldaric acid that is Mucic acid. Due to the symmetry in the Mucic acid molecule, it is optically inactive compound. Mucic acid is a meso compound due to the presence of chiral carbon atoms. Hence correct option is (C) D-galactose.

• When D-glucose on oxidation with $conc. HNO_{3}$, yields an optically active glucaric acid. Hence option (A) D-glucose, is wrong answer.
• When D-mannose on oxidation with $conc. HNO_{3}$, yield an optically active N,N′-dimethyl-D-mannaramide. Hence option (B) D-mannose, is wrong answer.
• When D-fructose on oxidation with $conc. HNO_{3}$, yield an optically inactive trihydroxy glutaric acid. Which exists in four stereoisomeric forms, two are optically active while remaining two are in meso forms. Hence, option (D) D-fructose, is wrong answer.

To know more about the concept please go through the links

https://brainly.in/question/38251081

https://brainly.in/question/6093943

#SPJ3