1. Which of the following is the main reason for the large number of organic compounds?
a) Low reactivity of carbon
b) Catenation property of carbon
c) Metallic nature of carbon
d) Isotopic forms of carbon
2. Which of the following compounds is the simplest hydrocarbon?
a) Ethane
b) Propane
c) Methane
d) Butane
3. Which allotrope of carbon is known for its hardness?
a) Graphite
b) Diamond
c) Fullerene
d) Amorphous carbon
4. The general formula for alkanes is:
a) CnH2n+2
b) CnH2n
c) CnH2n-2
d) CnHn
5. What type of bond is present in the ethene molecule?
a) Single bond
b) Double bond
c) Triple bond
d) Ionic bond
6. Which of the following is a saturated hydrocarbon?
a) Ethyne
b) Ethene
c) Propane
d) Butyne
7. The IUPAC name of the compound with the formula CH3CH2OH is:
a) Methanol
b) Ethanol
c) Propanol
d) Butanol
8. Which of the following is an isomer of butane?
a) Methane
b) Ethane
c) Propane
d) 2-Methylpropane
9. Which functional group is present in CH3COOH?
a) Alcohol
b) Aldehyde
c) Ketone
d) Carboxylic acid
10. The molecular formula of benzene is:
a) C6H12
b) C6H6
c) C5H6
d) C7H8
11. The process of converting unsaturated hydrocarbons into saturated hydrocarbons is called:
a) Cracking
b) Distillation
c) Hydrogenation
d) Fermentation
12. What is the name of the reaction in which ethanol is oxidized to acetic acid?
a) Esterification
b) Hydrogenation
c) Saponification
d) Oxidation
13. Which of the following statements is true about graphite?
a) It is a good conductor of electricity.
b) It is harder than diamond.
c) It is used as an insulator.
d) It is transparent.
14. What is the hybridization of carbon in methane (CH4)?
a) sp
b) sp2
c) sp3
d) sp3d
15. Which of the following is the correct molecular formula for propene?
a) C3H6
b) C3H8
c) C4H10
d) C2H4
16. What is the common name of ethanoic acid?
a) Acetone
b) Acetylene
c) Acetic acid
d) Alcohol
17. Which of the following is a characteristic property of carbon compounds?
a) High melting and boiling points
b) Poor conductors of electricity
c) They are all colorless
d) They form ionic bonds
18. What is the IUPAC name of the compound CH3COCH3?
a) Propanal
b) Propanone
c) Ethanol
d) Propanoic acid
19. The functional group present in alcohols is:
a) -CHO
b) -COOH
c) -OH
d) -CO-
20. Which hydrocarbon is commonly used as a fuel in gas stoves?
a) Methane
b) Ethane
c) Propane
d) Butane
21. The process of soap formation is called:
a) Esterification
b) Saponification
c) Hydrogenation
d) Fermentation
22. Which of the following statements about diamond is true?
a) It is a good conductor of electricity.
b) It is used as a lubricant.
c) It is the hardest natural substance.
d) It has a layered structure.
23. What is the molecular formula of ethyne?
a) C2H4
b) C2H6
c) C2H2
d) C2H8
24. Which of the following compounds is an aldehyde?
a) CH3OH
b) CH3COCH3
c) CH3CHO
d) CH3COOH
25. The hydrocarbon which contains a triple bond is called:
a) Alkane
b) Alkene
c) Alkyne
d) Cycloalkane
26. Which of the following is a use of ethanol?
a) As a lubricant
b) As a solvent
c) As an insulator
d) As a conductor
27. The structural formula of butane shows:
a) 3 carbon atoms and 8 hydrogen atoms
b) 4 carbon atoms and 8 hydrogen atoms
c) 4 carbon atoms and 10 hydrogen atoms
d) 2 carbon atoms and 6 hydrogen atoms
28. What type of isomerism is exhibited by butane and 2-methylpropane?
a) Chain isomerism
b) Position isomerism
c) Functional group isomerism
d) Tautomerism
29. The molecular formula of ethyl alcohol is:
a) C2H5OH
b) C2H4O2
c) CH3OH
d) C3H7OH
30. Which of the following is a primary alcohol?
a) CH3CH2OH
b) CH3CHOHCH3
c) (CH3)3COH
d) CH3COOH
31. Which of the following is a property of covalent compounds?
a) High melting points
b) Conduct electricity in molten state
c) Form ions in solution
d) Low melting and boiling points
32. Which of the following contains a carboxyl group?
a) CH3COOH
b) CH3OH
c) CH3CHO
d) C2H6
33. The molecular formula of methanol is:
a) CH4O
b) C2H6O
c) C3H8O
d) C4H10O
34. What is the IUPAC name of acetylene?
a) Ethyne
b) Ethene
c) Ethane
d) Ethanol
35. Which of the following is an unsaturated hydrocarbon?
a) Butane
b) Pentane
c) Hexane
d) Propene
36. Which of the following statements is true for esters?
a) They have a fruity smell.
b) They are formed by the reaction between alcohols and aldehydes.
c) They have a salty taste.
d) They contain the -OH group.
37. Which of the following compounds will decolorize bromine water?
a) Ethane
b) Ethene
c) Propane
d) Butane
38. The general formula for alkynes is:
a) CnH2n+2
b) CnH2n
c) CnH2n-2
d) CnHn
39. The IUPAC name for CH3CH2COOH is:
a) Ethanoic acid
b) Propanoic acid
c) Butanoic acid
d) Methanoic acid
40. Which of the following is the main product of the combustion of hydrocarbons?
a) Carbon monoxide and water
b) Carbon dioxide and water
c) Carbon and hydrogen
d) Carbon monoxide and hydrogen
41. Which functional group is found in aldehydes?
a) -CO-
b) -CHO
c) -COOH
d) -OH
42. Which compound is commonly used as an antiseptic?
a) Ethanoic acid
b) Ethanol
c) Methanol
d) Propanol
43. What is the name of the process in which unsaturated oils are converted into saturated fats?
a) Saponification
b) Polymerization
c) Hydrogenation
d) Oxidation
44. Which of the following hydrocarbons contains a double bond?
a) Ethane
b) Propane
c) Butene
d) Pentane
45. The compound with the formula C3H6 is:
a) Propane
b) Propene
c) Propanol
d) Propanone
46. What is the IUPAC name of CH3CH=CH2?
a) Propane
b) Propene
c) Propyne
d) Propanol
47. Which of the following is used as a fuel in welding torches?
a) Ethanol
b) Methane
c) Propane
d) Ethyne
48. What is the common name for the compound with the formula CH3COOCH3?
a) Methyl acetate
b) Ethyl acetate
c) Propyl acetate
d) Butyl acetate
49. Which of the following statements about fullerenes is true?
a) They are allotropes of carbon.
b) They are harder than diamond.
c) They are good conductors of electricity.
d) They have a hexagonal structure.
50. Which of the following compounds can exhibit isomerism?
a) Methane
b) Ethane
c) Butane
d) Propane
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Answers:
1. b) Catenation property of carbon
2. c) Methane
3. b) Diamond
4. a) CnH2n+2
5. b) Double bond
6. c) Propane
7. b) Ethanol
8. d) 2-Methylpropane
9. d) Carboxylic acid
10. b) C6H6
11. c) Hydrogenation
12. d) Oxidation
13. a) It is a good conductor of electricity.
14. c) sp3
15. a) C3H6
16. c) Acetic acid
17. b) Poor conductors of electricity
18. b) Propanone
19. c) -OH
20. d) Butane
21. b) Saponification
22. c) It is the hardest natural substance.
23. c) C2H2
24. c) CH3CHO
25. c) Alkyne
26. b) As a solvent
27. c) 4 carbon atoms and 10 hydrogen atoms
28. a) Chain isomerism
29. a) C2H5OH
30. a) CH3CH2OH
31. d) Low melting and boiling points
32. a) CH3COOH
33. a) CH4O
34. a) Ethyne
35. d) Propene
36. a) They have a fruity smell.
37. b) Ethene
38. c) CnH2n-2
39. b) Propanoic acid
40. b) Carbon dioxide and water
41. b) -CHO
42. b) Ethanol
43. c) Hydrogenation
44. c) Butene
45. b) Propene
46. b) Propene
47. d) Ethyne
48. a) Methyl acetate
49. a) They are allotropes of carbon.
50. c) Butane
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