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Why is (pm) butan-2-ol is optically inac...

Why is `(pm)` butan-2-ol is optically inactive?

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`(pm)` butan-2-ol is optically inactive as it exists in two enantiomeric forms, i.e. `(+)` and `(-)` forms, and these are non-superimposable mirror images of each other. Both of them are present in equal amounts, which cancel the optical rotation of each other as (+) butan-2-ol rotates the plane polarised light towards right and (-) butan-2-ol rotates the plane polarised light towards left to the same extent. Therefore, the overall rotation is zero and hence, `(pm)` butan-2-ol is optically inactive.
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ARIHANT PUBLICATION-HALOALKANES (ALKYL HALIDE) -PART-II- QUESTION FOR PRACTICE (SHORT ANSWER TYPE I QUESTIONS)
  1. Why alkyl halides, though polar, are immiscible with water?

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  2. Why is the solubility of haloalkanes in water very low?

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  3. Arrange each set of compounds in the order of increasing boiling point...

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  4. Arrange each set of compounds in the order of increasing boiling point...

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  5. Write the mechanism of the following reaction: nBuBr+KCNoverset(EtOH...

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  6. In the following pairs of halogen compounds, which compound undergoes ...

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  7. In the following pairs of halogen compounds, which compound undergoes ...

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  8. Which alkyl halide from the following pair is chiral and undergoes fas...

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  9. Out of S(N)1 and S(N)2 which reaction occurs with (a) inversion of c...

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  10. Which compound in each of the following pairs will react faster in S(N...

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  11. Which compound in each of the following pairs will react faster in S(N...

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  12. Tert-butylbromide reacts with aq. NaOH by S(N)1 mechanism while n-buty...

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  13. Write the structure of the major organic product in each of the follow...

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  14. Write the structure of the major organic product in each of the follow...

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  15. Why is (pm) butan-2-ol is optically inactive?

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  16. Elimination reactions (especially beta-elimination) are as common as t...

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  17. The treatment of ethyl bromide with aqueous KOH results ethyl alcohol ...

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  18. Draw the structures of major monohalo compound products in each of the...

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  19. Draw the structures of major monohalo compound products in each of the...

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