Home
Class 11
CHEMISTRY
Pure (S)-2-butanol has a specific rotati...

Pure (S)-2-butanol has a specific rotation of +13.52 degrees. A sample of 2-butanol prepared in the lab and purified by disillation has a calculated specific rotation of + 6.76 degrees. What can you conclude about the composition ?

A

50% (S), 50% impurity

B

50%(S), 50%(R)

C

50%(S),50%racemic

D

Some other mixutre

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • GENERAL ORGANIC CHEMISTRY

    NARAYNA|Exercise more than one answer type|15 Videos

  • GENERAL ORGANIC CHEMISTRY

    NARAYNA|Exercise Comprehension|7 Videos

  • GENERAL ORGANIC CHEMISTRY

    NARAYNA|Exercise Integer type questions|29 Videos

  • GENERAL ORGANIC CHEMISTRY

    NARAYNA|Exercise LEVEL-II (H.W)|21 Videos

  • HYDROCARBONS

    NARAYNA|Exercise EXERCISE - 4|18 Videos

Similar Questions

Explore conceptually related problems

Pure cholesterol has a specific rotation of -32. A sample of cholesterol prepared in the lab has a specific rotation of -8. The enatiomeric excess of the sample of chloresterol is x%. X is :

(R)-2-methyl-1-butanol has a specific rotation of +13.5^(@) . The specific rotation of 2-methyl-1-butanol containing 40% of the (S)-enantiomer is _____

Dextrororatory bytan -2-ol has a specific rotation [alpha]_(D)^(25) =+13.52^(@) . A sample of butan -2-ol shows a specific rotation [alpha]_(D)^(25)=+6.72^(@) . Calculate the enantiomers excess (or optical purity) of the sample?

The observed rotation of 2 gram of a compound in 10ml of solution in polarimeter tube of 25cm long is +24.6^(@) . The specific rotation of the compound (in degree) is

If solution of a compound ( 30g//100ml of solution ) has measured rotation of +15^(@) in a 2 dm long sample tube, the specific rotation of this compound is

D(+) Glucose has melting point 146^(@)C and specific rotation [alpha]_(C)6(25) is + 122^(@)C . Another D(+) Glucose has melting 150^(@) C and specific rotation [alpha]_(D)^(25) is + 18.7^(@)C . The two form have significantly different optical rotation but when an aqueous solution of either form is allowed to stand, it rotation changes. The specific rotation of one form decrease and rotation of other increases until both solution show the same value +52.7^(@) . The change in rotation towards an equilibrium value is called mutarotation. For mannose the mutarotation can be shown in brief as follow:

D(+) Glucose has melting point 146^(@)C and specific rotation [alpha]_(C)6(25) is + 122^(@)C . Another D(+) Glucose has melting 150^(@) C and specific rotation [alpha]_(D)^(25) is + 18.7^(@)C . The two form have significantly different optical rotation but when an aqueous solution of either form is allowed to stand, it rotation changes. The specific rotation of one form decrease and rotation of other increases until both solution show the same value +52.7^(@) . The change in rotation towards an equilibrium value is called mutarotation. What percentage of beta -D-(+) glucopyrnsone found at equillibrium in the aqueous solution?

(+)- Butan -2-ol has [alpha]_(D)^(20) =+13.9^(@) .a sample of butane 2-ol contianing both the enantiomers was found to have a specific rotation value of -3.5^(@) under similar conditions. The percentages of the (+) and (-) enantiomers present in the mixture are, respectively,

NARAYNA-GENERAL ORGANIC CHEMISTRY-Single correct answer
  1. Which of the following statements is true?

    Text Solution

    |

  2. Which of the following exhibit geometrical isomerism

    Text Solution

    |

  3. Pure (S)-2-butanol has a specific rotation of +13.52 degrees. A sample...

    Text Solution

    |

  4. Which of the following structures represents a chiral compound?

    Text Solution

    |

  5. The structural formula given below is that of camphor. Which of the fo...

    Text Solution

    |

  6. The drawing given below shows that cis-1,2-dichlorocyclohexane is chir...

    Text Solution

    |

  7. Which of the following has no sterogenic centre

    Text Solution

    |

  8. A compound contains 2 dissimilars asymmetric carbon atoms. The number ...

    Text Solution

    |

  9. How many optically active stereiosomers are possible of butane 2,3 dio...

    Text Solution

    |

  10. Number of meso forms and recemic forms are possible in the following s...

    Text Solution

    |

  11. Text Solution

    |

  12. Which of the following opticallty active

    Text Solution

    |

  13. Which of the following is not the optically active

    Text Solution

    |

  14. Which of the following have not a meso form

    Text Solution

    |

  15. Total number of stereoisomers of compound is: CH(3)-overset(Br)overs...

    Text Solution

    |

  16. Total number of stereoisomer of compound CH(3)-CH=CH-underset(CH(3))un...

    Text Solution

    |

  17. Total number of steroisomer of compound CH(3)-overset(OH)overset(|)(CH...

    Text Solution

    |

  18. The most stable conformational isomer of trans-1-ethyl-2-methylcyclohe...

    Text Solution

    |

  19. Which Newman projectin shows the most stable conformation of the follo...

    Text Solution

    |

  20. Which of the following is most stable conformation?

    Text Solution

    |