Home
Class 12
CHEMISTRY
The specific rotation of a pure enantiom...

The specific rotation of a pure enantiomers is `+12^(@)`. What will be its observed rotation if it is isolated form a reaction with `80%` racemization and `20%` inversion.

A

`+2.4^(@)`

B

`-9.6^(@)`

C

`+9.6^(@)`

D

`-2.4^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D

`alpha_(obs) =(20)/(100)(-12^(@))=-2.4^(@)`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The specific rotation of a pure enantiomers is +12^(@) . What will be its observed rotation if it is isolated form a reaction with 20% racemization and 80% retention.

a. The specific rotation of a pure enantiomer is +10^(@) . What will be its observed rotation if its is isolated from a reaction with i. 30% racemisation and 70% retention. ii. 70% racemisation and 30% inversion. b. What is the percentage composition of a mixtrue of two enantiomers whose rotation is -10^(@) ? The specific rotation of pure enantiomers is -20^(@) . c. What is the optical purity of a sample having an [alpha]_(obs.)=+9.0^(@) if [alpha]_(D)=+12^(@) .

The specific rotation of a pure enantiomer is +10^(@) . The observed rotation, if it is isolated from a reaction with 30% recemisation and 70% inversion is

The specific rotation of a pure enantiomer is +16^(@) its observed rotation if it is isolated from a reaction with 25% racemisation and 75% retention is,

The specific rotation of a pure enantiomer is +16^@ . The observed rotation, if it is isolated from a reaction with 25% racemisation and 75% inversion is

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

The angular momentum of rotating body is increased by 20% . What will be the increase in its rotational kinetic energy?

R SHARMA-STEREOCHEMISTRY-Level III
  1. Optical isomerism is not exhibited by

    Text Solution

    |

  2. (+)-Butan-2-ol has [alpha](D)^(20) =+13.9^(@).a sample of butane2-ol c...

    Text Solution

    |

  3. The specific rotation of a pure enantiomers is +12^(@). What will be i...

    Text Solution

    |

  4. Which of the following opertions performed on the figuration of (S)-bu...

    Text Solution

    |

  5. Consider the following configurations (A),(B),(C ) and (D) (A) ...

    Text Solution

    |

  6. Consider the following configuration (A),(B) and (C ). (A) Whic...

    Text Solution

    |

  7. The chemical properties of enantiomer are the same towards achiral (...

    Text Solution

    |

  8. Which fo the following stereosimers represent meso compounds?

    Text Solution

    |

  9. (S)-sec Buty1 chloride is subjected to free-radical chlorination follo...

    Text Solution

    |

  10. Cyclohexene on reaction with Br(2)in C CI(4) yields

    Text Solution

    |

  11. Consider the following reaction sequence The final product (III)...

    Text Solution

    |

  12. trans-But-2-ene reacts with cold dilute KMnO(4) solution to yield

    Text Solution

    |

  13. trans-But-2-ene reacts with D(2) in the presence of Ni as catayst. The...

    Text Solution

    |

  14. Geometrical isomerism is exihibited by

    Text Solution

    |

  15. The smallest ketone and its next homologue are reacted with H(2)NOH to...

    Text Solution

    |

  16. Which of the following Fischer's projection formula is identical to D-...

    Text Solution

    |

  17. Among the following four structures I to IV C(2)H(5)-overset(CH(3))o...

    Text Solution

    |

  18. The number of isomers for the compound with moelecular formula C(2)BrC...

    Text Solution

    |

  19. Give the IUPAC name of the alkene

    Text Solution

    |

  20. When NH(2)OH reacts with an usymmetrical ketone then numver of product...

    Text Solution

    |