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Although D-galactose rotates plane polar...

Although D-galactose rotates plane polarized light its oxidation product, galactaric acid, due to `HNO_(3)` does not, it is due to

A

galactaric acid is racemic mixture of D- and L- Isomer

B

Galactaric acid is a meso compound

C

Both are correct

D

None of the above is correct

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The correct Answer is:
B
Galactaric acid has plane of symmetry
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Structural isomers have different covalent linkage of atoms. Stereoisomers are compounds that have same sequence of covalent bonds but differ in the relative dispositions of their atoms in space. Geometri cal and optical isomers are the two important types of configurational isomers. The compound with double bonds or ring structure have restricted rotation, so exist in two geometrical forms. The double bonds in larger rings (ring size 10 carbon large) can also cause geometrical isomerism. The optical isomers rotate the plane of plane-polarised light. A sp^(3) -hybridised carbon atom bearing four different types of substituents is called an asymmetric centre or chiral centre. A chiral object or molecule cannot be superimposed on its mirror image. Stereoisomers that are mirror images of each other are called enantiomers. The stereosomers that the pot mirror images of each other are called diastereomers. Diasteremers have different physical properties. A racemic mixture is optically inactive and contains equal amounts of both the enantiomers. Resolution refers to method of separating a racemic mixture. Into two pure enantiomers. A meso compound is an optically inactive stereoisomer, which is achiral due to the presence of an internal plane of symmetry or centre of symmetry within the molecule. The number of chiral centres present in the following compounds is

Structural isomers have different covalent linkage of atoms. Stereoisomers are compounds that have same sequence of covalent bonds but differ in the relative dispositions of their atoms in space. Geometri cal and optical isomers are the two important types of configurational isomers. The compound with double bonds or ring structure have restricted rotation, so exist in two geometrical forms. The double bonds in larger rings (ring size 10 carbon large) can also cause geometrical isomerism. The optical isomers rotate the plane of plane-polarised light. A sp^(3) -hybridised carbon atom bearing four different types of substituents is called an asymmetric centre or chiral centre. A chiral object or molecule cannot be superimposed on its mirror image. Stereoisomers that are mirror images of each other are called enantiomers. The stereosomers that the pot mirror images of each other are called diastereomers. Diasteremers have different physical properties. A racemic mixture is optically inactive and contains equal amounts of both the enantiomers. Resolution refers to method of separating a racemic mixture. Into two pure enantiomers. A meso compound is an optically inactive stereoisomer, which is achiral due to the presence of an internal plane of symmetry or centre of symmetry within the molecule. The following two compounds are

A ceiling fan is rotating about its own axis with uniform angular velocity omega . The electric current is switched off then due to constant opposing torque its angular velocity is reduced to 2omega//3 as it completes 30 rotations. The number of rotations further it makes before coming to rest is

Consider a spherical planet which is rotating about its axis such that the speed of a point on its equator is v and the effective acceleration due to gravity on the equator is 1/3 of its value at the poles. What is the escape velocity for a particle at the pole of this planet.

An alcohol (A) on dehydration gives (B) which on ozonolysis gives two products C & D (D) gives positive iodoform test and on heating with dilute alkali gives alpha . beta -unsaturated carbonyl compound (E) which does not gives positive iodoform test. (C) on oxidation gives a mono basic acid (F) Ag salt of (F) contains 59.6% Ag. Oxime of (D) contains 16.09% nitrogen. structure of D is

An alcohol (A) on dehydration gives (B) which on ozonolysis gives two products C & D (D) gives positive iodoform test and on heating with dilute alkali gives alpha . beta -unsaturated carbonyl compound (E) which does not gives positive iodoform test. (C) on oxidation gives a mono basic acid (F) Ag salt of (F) contains 59.6% Ag. Oxime of (D) contains 16.09% nitrogen. the structure of (A) is

An alcohol (A) on dehydration gives (B) which on ozonolysis gives two products C & D (D) gives positive iodoform test and on heating with dilute alkali gives alpha . beta -unsaturated carbonyl compound (E) which does not gives positive iodoform test. (C) on oxidation gives a mono basic acid (F) Ag salt of (F) contains 59.6% Ag. Oxime of (D) contains 16.09% nitrogen. the structure of (E ) is given reaction is

AAKASH SERIES-CARBOHYDRATES-Practice Sheet-5
  1. Killiani-Fischer synthesis of D (+) Arabinose gives

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

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

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

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

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  6. Which of the following orders of sweetness is correct

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

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

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

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

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  11. Which relationship (s)is/are true

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

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

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  14. Which of the following statements are correct

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

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

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

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  18. What is true about compound (I)

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  19. Compound (II) is/has

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  20. Assuming that polymerisation of (I) takes place in the manner similar ...

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