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What do you understand by a racemic mixt...

What do you understand by a racemic mixture and why does it have no effect on plane polarised light?

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ICSE-ORGANIC CHEMISTRY : SOME BASIC PRINCIPLES AND TECHNIQUES -SHORT ANSWER TYPE QUESTIONS
  1. What are enantiomers ? Describe their important properties.

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  2. Define optical isomerism and give a brief account of optical isomers.

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  3. What do you understand by a racemic mixture and why does it have no ef...

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  4. Describe briefly what do you understand by the terms racemisation and ...

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  5. What is meant by asymmetric synthesis ? Give an example.

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  6. Why is meso-tartaric acid regarded achiral in nature ?

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  7. Discuss the optical isomerism of lactic acid.

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  8. Why is the net rotation of meso-tartaric acid zero ?

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  9. What are diastereoisomers ? Mention their important properties.

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  10. How would you detect the presence of carbon and hydrogen in a compound...

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  11. What is sodium extract and how is it prepared ?

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  12. Lassaigne's test for the detection of nitrogen fails in

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  13. Explain why : A blood red colouration is obtained on addition of Fe...

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  14. Explain why : A black precipitate is obtained in the Lassaigne's te...

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  15. Explain why : A blue or green colour in the flame is obtained during...

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  16. Explain why : Presence of Cl in a compound cannot be detected by ad...

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  17. Explain why : No precipitate is obtained on adding AgNO3 to chlorome...

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  18. Describe the principle involved in the quantitative estimation of nitr...

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  19. Describe the Carius method for the estimation of sulphur in a compound...

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  20. Describe the principle involved in the estimation of phosphorus in an ...

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