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The reagent which forms crystalline osaz...

The reagent which forms crystalline osazone derivatives with glucose is

A

Fehling solution

B

Phenyl hydrazine

C

Benedict's solution

D

Hydroxylamine

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The correct Answer is:
B
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D-tagatose is a 2-ketohexose which forms same osazone as D-galactose. What is the structure of D-tagatose

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

Sugars are characterized by the preparation of Osazone derivatives. Which sugars have identical osazones

The reagents which don't react with glucose are I) Schiff's reagent II) Tollen's reagent III) Fehling reagent IV) NaHSO_(3) V) NH_3

Sugar are characterised by the preparation of osazone derivatives. Which sugar have identical osazones?

The reagent with which ethanol is oxidised to ethanal is

Monosaccharides and disaccharides in which aldehyde group is free reduce Tollen's reagent as well as Fehling solution and hence are known as reducing sugars. Carbohydrates react with excess of phcayl kydrazine to yield their crystalline derivatives called oxazones. In osazone formation only the first two carbon atoms are irrelved Osazone on hydrolysis gives same which are reduction with ZnCH_(3)COOH gives a ketose sugar The same osazone is formed by

Monosaccharides and disaccharides in which aldehyde group is free reduce Tollen's reagent as well as Fehling solution and hence are known as reducing sugars. Carbohydrates react with excess of phcayl kydrazine to yield their crystalline derivatives called oxazones. In osazone formation only the first two carbon atoms are irrelved Osazone on hydrolysis gives same which are reduction with ZnCH_(3)COOH gives a ketose sugar Osazone cannot be formed by whihc of the following

Monosaccharides and disaccharides in which aldehyde group is free reduce Tollen's reagent as well as Fehling solution and hence are known as reducing sugars. Carbohydrates react with excess of phcayl kydrazine to yield their crystalline derivatives called oxazones. In osazone formation only the first two carbon atoms are irrelved Osazone on hydrolysis gives same which are reduction with ZnCH_(3)COOH gives a ketose sugar The end product 'Z' in the following sequence of reactions. Glucose, underset(("excess"))overset(Ph. NH.NH_(2))rarr X underset(Delta)overset(H_(2)O//H^(+))rarr Y overset(Zn//AcOH)rarrZ

Which one of the following hydrocarbons will form only one monochloro derivative with Cl_2//hv .

AAKASH SERIES-CARBOHYDRATES-Practice Sheet-5
  1. The reagent which forms crystalline osazone derivatives with glucose i...

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  2. D-tagatose is a 2-ketohexose which forms same osazone as D-galactose. ...

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  3. The correct chair form structures of beta- galactose will be

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  4. Killiani-Fischer synthesis of D (+) Arabinose gives

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  5. An optically active compound A gave an [alpha](0)^(25) = 30^(@) while ...

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  6. Although D-galactose rotates plane polarized light its oxidation produ...

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  7. underset(underset(CH(2)OH)(|))overset(overset(overset(overset(CHO)(|))...

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  8. Find the average molecular mass of starch given that an aqueous soluti...

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  9. Which of the following orders of sweetness is correct

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  10. In the multi step conversion of an Aldose in to next higher Aldose by ...

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  11. The Fischer projection formula shown above is the enolic form of

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  12. The correct chair form of given Haworth Structure will be

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  13. The product of the reaction D-Glyceraldehyde underset(HCl)overset(Me(2...

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  14. Which relationship (s)is/are true

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  15. Which of the following monosaccharides yields an optically active aldi...

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  16. Observe the following reaction and mark the correct statements(s)given...

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  17. Which of the following statements are correct

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  18. Monosaccharides have -CHO (or C=O) and -OH groups, so they undergo usu...

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  19. Monosaccharides have -CHO (or C=O) and -OH groups, so they undergo usu...

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  20. Monosaccharides have -CHO (or C=O) and -OH groups, so they undergo usu...

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  21. What is true about compound (I)

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