Home
Class 12
CHEMISTRY
D-tagatose is a 2-ketohexose which forms...

D-tagatose is a 2-ketohexose which forms same osazone as D-galactose. What is the structure of D-tagatose

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
Since D-tagatose (a keto hexose) and D-galactose form the same osazone, they have same configuration at `C-3, C-4, C-5 and C-6`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CARBOHYDRATES

    AAKASH SERIES|Exercise Practice Sheet-4|30 Videos

  • BIOMOLECULES

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE-4 (ASSERTION (A) & REASON (R) TYPE QUESTIONS :)|84 Videos

  • CARBOXYLIC ACIDS

    AAKASH SERIES|Exercise PRACTICE SHEET-4 (Integer Type Questions)|9 Videos

Similar Questions

Explore conceptually related problems

What is the shape of d-orbital ?

What is the substance ‘D’? why?

Knowledge Check

  • Draw the structure of beta-D-(-) fructfuranose is

    A
    B
    C
    D

  • Regarding lactose some statements are given below A) On hydrolysis lactose gives beta-D- galactose and beta-D - glucose B) In lactose C_(1) of beta-D- galactose has acetal structure and C_(1) of beta- D - glucose has hemiacetal structure C) In lactose molecule beta-D - galactose is a nonreducing unit and beta-D - glucose is a reducing unit The correct statements are

    A
    A, C
    B
    A, B
    C
    B, C
    D
    A, B, C

  • Monosaccharides have -CHO (or C=O) and -OH groups, so they undergo usual oxidation and reduction. Further, monosaccharides from osazone when treated with excess of phenylhdrazine (3 equivalents). In osazone formation only the first two carbon atoms are involved. Thus monosaccharidxes having identical configuration on reset of C atoms except first two will form same osazone, as is the case with glucose and fructose. A, B and C are three hexoses and form same osazone D. Compounds A to D behave as below (A) D overset(HCl)rarr underset(CH_(3)COOH)overset(Zn)rarr D - Fructose (B) A overset(Ni.H_(2))rarr overset(HNO_(3))rarr underset(H_(3)O^(+))overset(Na-Hg)rarr B + C (C ) B overset(HNO_(3))rarr Optically active glycaric acid (D) C overset(HNO_(3))rarr Optically inactive glycaric acid Compound D is an osazone which can be obtained from

    A
    only compound
    B
    two compounds
    C
    three compounds
    D
    four compounds

    • Similar Questions

    Explore conceptually related problems

    Which of the following is the correct Fischer representation of D-galactose? The structure of beta-D -galactopyranose is provided

    Find structure of compound D :

    Find structure of compound D :

    Monosaccharides have -CHO (or C=O) and -OH groups, so they undergo usual oxidation and reduction. Further, monosaccharides from osazone when treated with excess of phenylhdrazine (3 equivalents). In osazone formation only the first two carbon atoms are involved. Thus monosaccharidxes having identical configuration on reset of C atoms except first two will form same osazone, as is the case with glucose and fructose. A, B and C are three hexoses and form same osazone D. Compounds A to D behave as below (A) D overset(HCl)rarr underset(CH_(3)COOH)overset(Zn)rarr D - Fructose (B) A overset(Ni.H_(2))rarr overset(HNO_(3))rarr underset(H_(3)O^(+))overset(Na-Hg)rarr B + C (C ) B overset(HNO_(3))rarr Optically active glycaric acid (D) C overset(HNO_(3))rarr Optically inactive glycaric acid Compound A should be

    Monosaccharides have -CHO (or C=O) and -OH groups, so they undergo usual oxidation and reduction. Further, monosaccharides from osazone when treated with excess of phenylhdrazine (3 equivalents). In osazone formation only the first two carbon atoms are involved. Thus monosaccharidxes having identical configuration on reset of C atoms except first two will form same osazone, as is the case with glucose and fructose. A, B and C are three hexoses and form same osazone D. Compounds A to D behave as below (A) D overset(HCl)rarr underset(CH_(3)COOH)overset(Zn)rarr D - Fructose (B) A overset(Ni.H_(2))rarr overset(HNO_(3))rarr underset(H_(3)O^(+))overset(Na-Hg)rarr B + C (C ) B overset(HNO_(3))rarr Optically active glycaric acid (D) C overset(HNO_(3))rarr Optically inactive glycaric acid Compound B and C, respectively are

    Home
    Profile