Organic Chemistry MCQs

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1. What is the functional group present in amines? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -NH2 (Amino) Answer: d) -NH2 (Amino) 2. Which of the following is an example of a ketone? a) Ethanol b) Acetone c) Methanol d) Butanol Answer: b) Acetone 3. What is the IUPAC name for CH3CH2CH2COOH? a) Propanoic acid b) Butanoic acid c) Pentanoic acid d) Methanoic acid Answer: a) Propanoic acid 4. Which functional group characterizes carboxylic acids? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -NH2 (Amino) Answer: c) -COOH (Carboxylic acid) 5. What is the IUPAC name for CH3CH2CH2CH2CH3? a) Pentane b) Butane c) Hexane d) Propane Answer: a) Pentane 6. Which of the following is an example of a tertiary alcohol? a) Methanol b) Ethanol c) Isopropanol d) Butanol Answer: c) Isopropanol 7. What is the functional group present in esters? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -COO- (Ester) Answer: d) -COO- (Ester) 8. Which of the following is an example of a primary amine? a) Ammonia (NH3) b) Ethylamine (CH3CH2NH2) c) Dimethylamine (CH3NHCH3) d) Trimethylamine (N(CH3)3) Answer: b) Ethylamine (CH3CH2NH2) 9. What is the IUPAC name for CH3CH2CHO? a) Propanal b) Butanal c) Pentanal d) Hexanal Answer: a) Propanal 10. Which of the following is an example of an ester? a) Methanol b) Ethanol c) Acetic acid d) Ethyl acetate Answer: d) Ethyl acetate 11. What is the IUPAC name for CH3CH2CH3? a) Methane b) Ethane c) Propane d) Butane Answer: b) Ethane 12. Which of the following is an example of a secondary amine? a) Ammonia (NH3) b) Ethylamine (CH3CH2NH2) c) Dimethylamine (CH3NHCH3) d) Trimethylamine (N(CH3)3) Answer: c) Dimethylamine (CH3NHCH3) 13. What is the IUPAC name for CH3CH2CH2CH2OH? a) Pentanol b) Butanol c) Hexanol d) Propanol Answer: a) Pentanol 14. Which of the following is an example of an aldehyde? a) Ethanol b) Acetone c) Methanal d) Butanol Answer: c) Methanal 15. What is the functional group present in amines? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -NH2 (Amino) Answer: d) -NH2 (Amino) 16. Which of the following is an example of a ketone? a) Ethanol b) Acetone c) Methanol d) Butanol Answer: b) Acetone 17. What is the IUPAC name for CH3CH2CH2COOH? a) Propanoic acid b) Butanoic acid c) Pentanoic acid d) Methanoic acid Answer: a) Propanoic acid 18. Which functional group characterizes carboxylic acids? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -NH2 (Amino) Answer: c) -COOH (Carboxylic acid) 19. What is the general formula for alkynes? a) CnH2n+2 b) CnH2n c) CnH2n-2 d) CnHn Answer: c) CnH2n-2 20. Which of the following is a primary alcohol? a) Ethanol b) Isopropanol c) Butanol d) Methanol Answer: a) Ethanol 21. What is the IUPAC name for CH3CH2CH3? a) Methane b) Ethane c) Propane d) Butane Answer: b) Ethane 22. Which of the following is an example of a secondary amine? a) Ammonia (NH3) b) Ethylamine (CH3CH2NH2) c) Dimethylamine (CH3NHCH3) d) Trimethylamine (N(CH3)3) Answer: b) Ethylamine (CH3CH2NH2) 23. What is the IUPAC name for CH3CH2CH2CH2OH? a) Pentanol b) Butanol c) Hexanol d) Propanol Answer: a) Pentanol 24. Which of the following is an example of an aldehyde? a) Ethanol b) Acetone c) Methanal d) Butanol Answer: c) Methanal 25. What is the functional group present in amines? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -NH2 (Amino) Answer: d) -NH2 (Amino) 26. Which of the following is an example of a ketone? a) Ethanol b) Acetone c) Methanol d) Butanol Answer: b) Acetone 27. What is the IUPAC name for CH3CH2CH2COOH? a) Propanoic acid b) Butanoic acid c) Pentanoic acid d) Methanoic acid Answer: a) Propanoic acid 28. Which functional group characterizes carboxylic acids? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -NH2 (Amino) Answer: c) -COOH (Carboxylic acid) 29. What is the IUPAC name for CH3CH2CH2CH2CH3? a) Pentane b) Butane c) Hexane d) Propane Answer: a) Pentane 30. Which of the following is an example of a tertiary alcohol? a) Methanol b) Ethanol c) Isopropanol d) Butanol Answer: c) Isopropanol 31. What is the functional group present in esters? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -COO- (Ester) Answer: d) -COO- (Ester) 32. Which of the following is an example of a primary amine? a) Ammonia (NH3) b) Ethylamine (CH3CH2NH2) c) Dimethylamine (CH3NHCH3) d) Trimethylamine (N(CH3)3) Answer: b) Ethylamine (CH3CH2NH2) 33. What is the IUPAC name for CH3CH2CHO? a) Propanal b) Butanal c) Pentanal d) Hexanal Answer: a) Propanal 34. Which of the following is an example of an ester? a) Methanol b) Ethanol c) Acetic acid d) Ethyl acetate Answer: d) Ethyl acetate 35. What is the IUPAC name for CH3CH2CH3? a) Methane b) Ethane c) Propane d) Butane Answer: b) Ethane 36. Which of the following is an example of a secondary amine? a) Ammonia (NH3) b) Ethylamine (CH3CH2NH2) c) Dimethylamine (CH3NHCH3) d) Trimethylamine (N(CH3)3) Answer: c) Dimethylamine (CH3NHCH3) 37. What is the IUPAC name for CH3CH2CH2CH2OH? a) Pentanol b) Butanol c) Hexanol d) Propanol Answer: a) Pentanol 38. Which of the following is an alkane? a) Methanol b) Ethanol c) Propane d) Acetic acid Answer: c) Propane 39. What is the functional group present in aldehydes? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -NH2 (Amino) Answer: b) -CHO (Aldehyde) 40. What is the IUPAC name for CH3CH2CH2OH? a) Ethyl alcohol b) Propanol c) Butanol d) Methanol Answer: b) Propanol 41. Which of the following is an aromatic compound? a) Propane b) Benzene c) Ethanol d) Butanol Answer: b) Benzene 42. What is the general formula for alkanes? a) CnH2n+2 b) CnH2n c) CnH2n-2 d) CnHn Answer: a) CnH2n+2 43. Which of the following is a ketone? a) Ethanol b) Acetone c) Methanol d) Propanol Answer: b) Acetone 44. What is the IUPAC name for CH3CH2COOH? a) Ethyl acid b) Propanoic acid c) Butanoic acid d) Methanoic acid Answer: b) Propanoic acid 45. Which functional group characterizes alcohols? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -NH2 (Amino) Answer: a) -OH (Hydroxyl) 46. What is the IUPAC name for CH3CH2CH2CH3? a) Methane b) Ethane c) Propane d) Butane Answer: d) Butane 47. Which of the following is an unsaturated hydrocarbon? a) Ethane b) Propane c) Ethene d) Butane Answer: c) Ethene 48. What is the general formula for alkenes? a) CnH2n+2 b) CnH2n c) CnH2n-2 d) CnHn Answer: b) CnH2n 49. Which of the following is a carboxylic acid? a) Methanol b) Ethanol c) Acetic acid d) Butanol Answer: c) Acetic acid 50. What is the functional group present in ethers? a) -OH (Hydroxyl) b) -COOH (Carboxylic acid) c) -NH2 (Amino) d) -O- (Ether) Answer: d) -O- (Ether) 51. What is the IUPAC name for CH3CH2CH2CH2CH3? a) Pentane b) Butane c) Hexane d) Propane Answer: a) Pentane 52. Which of the following is an example of a secondary alcohol? a) Methanol b) Ethanol c) Isopropanol d) Butanol Answer: c) Isopropanol 53. What is the functional group present in esters? a) -OH (Hydroxyl) b) -CHO (Aldehyde) c) -COOH (Carboxylic acid) d) -COO- (Ester) Answer: d) -COO- (Ester) 54. Which of the following is an example of a tertiary amine? a) Ammonia (NH3) b) Ethylamine (CH3CH2NH2) c) Dimethylamine (CH3NHCH3) d) Trimethylamine (N(CH3)3) Answer: d) Trimethylamine (N(CH3)3) 55. What is the IUPAC name for CH3CH2CHO? a) Propanal b) Butanal c) Pentanal d) Hexanal Answer: a) Propanal

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