Carbon and its Compounds CBSE Class 10
1. Which element is present in all organic compounds?
A) Oxygen
B) Nitrogen
C) Carbon
D) Hydrogen
Answer: Carbon
2. Which of the following is a hydrocarbon?
A) C₂H₅OH
B) CH₄
C) CH₃COOH
D) C₆H₁₂O₆
Answer: CH₄
3. Which of the following is a saturated hydrocarbon?
A) Ethene
B) Ethyne
C) Ethane
D) Benzene
Answer: Ethane
4. Which of the following is an unsaturated hydrocarbon?
A) Ethane
B) Propane
C) Ethene
D) Methane
Answer: Ethene
5. The general formula of alkanes is
A) CₙH₂ₙ
B) CₙH₂ₙ₊₂
C) CₙH₂ₙ₋₂
D) CₙHₙ
Answer: CₙH₂ₙ₊₂
6. The general formula of alkenes is
A) CₙH₂ₙ
B) CₙH₂ₙ₊₂
C) CₙH₂ₙ₋₂
D) CₙHₙ
Answer: CₙH₂ₙ
7. The general formula of alkynes is
A) CₙH₂ₙ₊₂
B) CₙH₂ₙ
C) CₙH₂ₙ₋₂
D) CₙHₙ
Answer: CₙH₂ₙ₋₂
8. What is the functional group of alcohols?
A) –COOH
B) –CHO
C) –OH
D) –CO–
Answer: –OH
9. Which functional group is present in carboxylic acids?
A) –OH
B) –COOH
C) –CHO
D) –CO–
Answer: –COOH
Carbon and its Compounds CBSE Class 10
10. Which functional group is present in aldehydes?
A) –COOH
B) –CO–
C) –CHO
D) –OH
Answer: –CHO
11. Which of the following is an alcohol?
A) CH₃COOH
B) C₂H₅OH
C) HCHO
D) CH₃COCH₃
Answer: C₂H₅OH
12. Which of the following is a carboxylic acid?
A) C₂H₅OH
B) CH₃COOH
C) HCHO
D) C₂H₆
Answer: CH₃COOH
13. Which compound is also called ethanoic acid?
A) Acetic acid
B) Formic acid
C) Lactic acid
D) Citric acid
Answer: Acetic acid
14. Which gas is produced when ethanol reacts with sodium?
A) Carbon dioxide
B) Hydrogen
C) Oxygen
D) Nitrogen
Answer: Hydrogen
15. Which of the following is used as a fuel?
A) Ethanol
B) Acetic acid
C) Glucose
D) Methanoic acid
Answer: Ethanol
16. Which compound is used in alcoholic beverages?
A) Methanol
B) Ethanol
C) Propanol
D) Butanol
Answer: Ethanol
17. Which acid is present in vinegar?
A) Citric acid
B) Acetic acid
C) Oxalic acid
D) Lactic acid
Answer: Acetic acid
18. Soap is a salt of
A) Strong acid and strong base
B) Weak acid and strong base
C) Strong acid and weak base
D) Weak acid and weak base
Answer: Weak acid and strong base
19. Which of the following is used to make soap?
A) Vegetable oil
B) Animal fat
C) Both vegetable oil and animal fat
D) Petrol
Answer: Both vegetable oil and animal fat
20. The process of making soap is called
A) Esterification
B) Neutralisation
C) Saponification
D) Fermentation
Answer: Saponification
21. Detergents work well in hard water because
A) They do not form scum
B) They form scum
C) They react with calcium ions
D) They are weak acids
Answer: They do not form scum
22. Which compound is used to make polyester?
A) Ethanol
B) Ethanoic acid
C) Ethene
D) Glucose
Answer: Ethene
23. Which polymer is used to make plastic bags?
A) PVC
B) Polythene
C) Teflon
D) Nylon
Answer: Polythene
24. Which polymer is used for non-stick cookware?
A) PVC
B) Polythene
C) Teflon
D) Nylon
Answer: Teflon
25. Which of the following is a natural polymer?
A) Nylon
B) Polythene
C) Starch
D) PVC
Answer: Starch
26. Which compound is used as a preservative in pickles?
A) Methanol
B) Ethanol
C) Acetic acid
D) Propanol
Answer: Acetic acid
27. Which compound is used to remove nail polish?
A) Methanol
B) Acetone
C) Ethanol
D) Acetic acid
Answer: Acetone
28. Which of the following is an ester?
A) CH₃COOH
B) C₂H₅OH
C) CH₃COOC₂H₅
D) C₂H₆
Answer: CH₃COOC₂H₅
Carbon and its Compounds CBSE Class 10
29. Esters have a pleasant
A) Taste
B) Colour
C) Smell
D) Texture
Answer: Smell
30. Esterification is the reaction between
A) Acid and base
B) Alcohol and acid
C) Alkane and alkene
D) Aldehyde and ketone
Answer: Alcohol and acid
31. Which of the following is a detergent?
A) Soap
B) Shampoo
C) Washing soda
D) Bleaching powder
Answer: Shampoo
32. Which gas is released when ethanol is burnt?
A) Hydrogen
B) Carbon dioxide
C) Oxygen
D) Nitrogen
Answer: Carbon dioxide
33. Which of the following is a homologous series?
A) CH₄, C₂H₆, C₃H₈
B) CH₄, C₂H₄, C₃H₆
C) CH₄, C₂H₂, C₃H₄
D) CH₄, C₂H₅OH, CH₃COOH
Answer: CH₄, C₂H₆, C₃H₈
34. Which of the following is an alkene?
A) Methane
B) Ethane
C) Ethene
D) Ethyne
Answer: Ethene
35. Which compound is used as a solvent?
A) Acetone
B) Glucose
C) Soap
D) Starch
Answer: Acetone
36. Which functional group is present in ketones?
A) –CO–
B) –COOH
C) –CHO
D) –OH
Answer: –CO–
37. Which compound is used in dry cleaning?
A) Ethanol
B) Methanol
C) Tetrachloroethene
D) Acetic acid
Answer: Tetrachloroethene
38. Which fuel is known as LPG?
A) Methane
B) Propane and butane
C) Ethane
D) Ethene
Answer: Propane and butane
39. Which compound is used to make polythene?
A) Ethane
B) Ethene
C) Ethanol
D) Ethanoic acid
Answer: Ethene
40. Which acid is present in lemon?
A) Acetic acid
B) Citric acid
C) Lactic acid
D) Oxalic acid
Answer: Citric acid
41. Which alcohol is poisonous?
A) Ethanol
B) Methanol
C) Propanol
D) Butanol
Answer: Methanol
42. Which compound is called wood alcohol?
A) Ethanol
B) Methanol
C) Propanol
D) Butanol
Answer: Methanol
43. Which product is formed when ethanol is oxidised?
A) Ethanoic acid
B) Ethane
C) Ethene
D) Methanol
Answer: Ethanoic acid
44. Which of the following is biodegradable?
A) Polythene
B) Plastic
C) Soap
D) PVC
Answer: Soap
45. Which compound is used in perfumes?
A) Esters
B) Alcohols
C) Acids
D) Alkanes
Answer: Esters
46. Which of the following is a greenhouse gas?
A) Methane
B) Oxygen
C) Nitrogen
D) Hydrogen
Answer: Methane
47. Which compound is used as a refrigerant?
A) CFCs
B) Ethanol
C) Acetic acid
D) Glucose
Answer: CFCs
Carbon and its Compounds CBSE Class 10
48. Which of the following is a fossil fuel?
A) Ethanol
B) Biogas
C) Petrol
D) Hydrogen
Answer: Petrol
49. Which allotrope of carbon is the hardest?
A) Graphite
B) Coal
C) Diamond
D) Charcoal
Answer: Diamond
50. Which allotrope of carbon is a good conductor of electricity?
A) Diamond
B) Coal
C) Graphite
D) Charcoal
Answer: Graphite
Read Also: Metals and Non-metals CBSE Class 10