Organic Chemistry Practice MCQs (Answers) for Class 12

Organic Chemistry Practice MCQs (Answers) for Class 12

Ans 1. (b) Propan-2-ol      

Ans 2. (d) Propanone

Ans 3. (b) 1-Methylcyclohexan-1-ol

Ans 4. (d) X on reaction with Na, does not produce H₂ gas

Ans 5. (d) Benzyl alcohol 

Ans 6. (c) Treatment with pyridinium chlorochromate                

Ans 7. (b) Substitution reaction 

Ans 8. (c) B, C                  

Ans 9. (b)

Ans 10. (b) o-nitrophenol 

Ans 11. (d) m-Chlorophenol 

Ans 12. (a) Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol      

Ans 13. (a) CH₃CHOHCH₃          

Ans 14. (c) Both types                  

Ans 15. (a) Pri > Sec > Ter           
Since Na metal is basic and alcohols are acidic in nature, therefore, the reactivity of Na metal towards alcohols decreases as the acidic strength of alcohols decreases, i.e. in the order 1⁰ > 2⁰ > 3⁰.

Ans 16. (c) The assertion is a correct statement but the reason is the wrong statement.

Ans 17. (d) The assertion is a wrong statement but the reason is the correct statement.

Ans 18. (a) Assertion and reason both are correct and the reason is the correct explanation of assertion.

Ans 19. (c) The assertion is a correct statement but the reason is the wrong statement.

Ans 20. (e) Both assertion and reason are correct statements but the reason is not the correct explanation of assertion.

Ans 21. (a) Assertion and reason both are correct and the reason is the correct explanation of assertion.

Ans 22. (e) Both assertion and reason are correct statements but the reason is not the correct explanation of assertion.

Ans 23. (a) Assertion and reason both are correct and the reason is the correct explanation of assertion.

Ans 24. (d) Replication

Ans 25. (a) An enzyme     

Ans 26. (b) A globular protein
Hemoglobin is a globular protein of four subunits, each subunit having a heme moiety and a polypeptide chain (Two α and two β chains).

Ans 27. (a) Does not undergo hydrolysis                                     

Ans 28. (a) Cane sugar                 

Ans 29. (c) D-glucose                   

Ans 30. (b) Anomers                    

Ans 31. (d) Glycine

Ans 32. (b) Monosaccharide                    

Ans 33. (d) Aldose

Ans 34. (c) H-bond                       

Ans 35. (d) Both (a) and (b)

Ans 36. (d) Hydroxylamine

Ans 37. (a) n-hexane                    

Ans 38. (a) Alpha amino acids     

Ans 39. (c) 2,4 – DNP reagent                  

Ans 40. (a) Five

Organic Chemistry Practice MCQs (Answers) for Class 12

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Organic Chemistry Practice MCQs for Class 12