Organic Chemistry – Basic Principles – Multiple Choice Questions (MCQs)

1. 13. Q13: Tautomerism is shown by:

   • A. Aldehydes
   • B. Ketones
   • C. Alkenes
   • D. Both Aldehydes and Ketones

2. 14. Q14: The resonance effect involves:

   • A. Inductive effect
   • B. Delocalization of electrons
   • C. Charge separation
   • D. Only sigma bonds

3. 15. Q15: Which of the following is not an electrophile?

   • A. BF3
   • B. NO2+
   • C. AlCl3
   • D. NH3

4. 16. Q16: Which group shows +I effect?

   • A. NO2
   • B. CN
   • C. CH3
   • D. COOH

5. 17. Q17: The resonance effect involves:

   • A. Inductive effect
   • B. Delocalization of electrons
   • C. Charge separation
   • D. Only sigma bonds

6. 18. Q18: Which of the following is not an electrophile?

   • A. BF3
   • B. NO2+
   • C. AlCl3
   • D. NH3

7. 19. Q19: Which of the following statements is correct for inductive effect?

   • A. It involves delocalization of electrons
   • B. It is a permanent effect
   • C. It operates through space
   • D. It is a temporary effect

8. 20. Q20: Which of the following is the correct IUPAC name for CH3-CH2-CH2OH?

   • A. Propanol
   • B. Butanol
   • C. Ethanol
   • D. Methanol

9. 21. Q21: The bond angle in methane is:

   • A. 90°
   • B. 109.5°
   • C. 120°
   • D. 180°

10. 22. Q22: Which of the following can show hyperconjugation?

    • A. Methane
    • B. Ethane
    • C. Propene
    • D. Ethyne

11. 23. Q23: Hybridization of carbon in ethene is:

    • A. sp
    • B. sp2
    • C. sp3
    • D. sp3d

12. 24. Q24: Which of the following can show hyperconjugation?

    • A. Methane
    • B. Ethane
    • C. Propene
    • D. Ethyne