Isomerism

When an optically active compound is placed in a 10 dm tube, it is present 20 gm in a 200 mL solution rotates the PPL by 30^o. Calculate the angle of rotation and specific angle of rotation if above solution diluted to 1 litre.

Which of the following combinations amongst the four Fischer projections represents the same absolute configurations?


                 



       

On chlorination of propane, the number of products having the formula ${\mathrm{C}}_3{\mathrm{H}}_6{\mathrm{Cl}}_2$ is 

Which of the above compounds are enantiomers?

Which of the above formula represent identical compounds?

How many stereoisomer of the following molecule are possible? HOOC.CH = C = CH.COOH

The compound with the above configuration is called:

The number of isomers of C₃H₅Br₃ (including stereoisomers):

An optically pure compound X gave an ${\left[\alpha \right]}_{\text{D}}^{25}=+20\text{.}{0}^{\circ }$. A mixture of X and its enantiomer Y gave ${\left[\alpha \right]}_{\text{D}}^{25}=+10^{\circ }$. The ratio of X to Y in the mixture is:

Which of the following statements is true for a pair of diastereomers?

Which of the following sugars has the configuration (2S, 3R, 4R)?

Stereoisomers differ from each other in what respect?

(+) - mandelic acid has a specific rotation of 158^o. What would be the observed specific rotation of a mixture of 25% (-) - mandelic acid and 75% (+) - mandelic acid ?

(+) - mandelic acid has a specific rotation of 158^o. What would be the observed specific rotation of a mixture of 25% (-) - mandelic acid and 75% (+) - mandelic acid?

Dextrorotatory$$$\alpha \text{-}$pinene has a specific rotation ${\left[\alpha \right]}_{\text{D}}^{20}=+{\text{ 51.3}}^{\circ }$. A sample of $$$\alpha \text{-}$pinene containing both the enantiomers was found to have a specific rotation value ${\left[\alpha \right]}_{\text{D}}^{20}=+{\text{ 30.8}}^{\circ }$. The percentages of the (+) and (-) enantiomers present in the sample are, respectively.

Dextrorotatory$$$\alpha \text{-}$pinene has a specific rotation ${\left[\alpha \right]}_{\text{D}}^{20}=+{\text{ 51.3}}^{\circ }$. A sample of $$$\alpha \text{-}$pinene containing both the enantiomers was found to have a specific rotation value ${\left[\alpha \right]}_{\text{D}}^{20}=+{\text{ 30.8}}^{\circ }$. The percentages of the (+) and (-) enantiomers present in the sample are, respectively.

Dextrorotatory $\alpha \text{-}$pinene has a specific rotation ${\left[\alpha \right]}_{\text{D}}^{20}=+{\text{ 51.3}}^{\circ }$. A sample of $\alpha \text{-}$pinene containing both the enantiomers was found to have a specific rotation value ${\left[\alpha \right]}_{\text{D}}^{20}=+{\text{ 30.8}}^{\circ }$. The percentages of the (+) and (-) enantiomers present in the sample are, respectively:

 
Relation between given pair is:

Optical rotation produced by is 36^o then that product by is

How many stereoisomers are possible for the following compound?