This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Carbon And Its Compounds > Class 10 Science Chapter 4 Carbon And Its Compounds – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following removes carbon from the atmosphere? A) Death. B) Photosynthesis. C) Respiration. D) Combustion. Show Answer Correct Answer: B) Photosynthesis. 2. What is the function of enzymes? A) To transport nutrients across cell membranes. B) To provide energy for cellular processes. C) To speed up chemical reactions in the body. D) To slow down chemical reactions in the body. Show Answer Correct Answer: C) To speed up chemical reactions in the body. 3. Cellulose is a complex carbohydrate that makes up the cell walls of plants. Which of the following elements are main components of cellulose? A) Calcium and chlorine. B) Carbon and hydrogen. C) Potassium and chlorine. D) Sodium and hydrogen. Show Answer Correct Answer: B) Carbon and hydrogen. 4. This organic compound is known as the building blocks of our body & has many enzymes that each have a special function: A) Carbohydrates. B) Nucleic Acids. C) Proteins. D) Lipids. Show Answer Correct Answer: C) Proteins. 5. The bond length of c-c bond in benzene is A) 1.33A. B) 1.23A. C) 1.45 A. D) 1.38A. Show Answer Correct Answer: D) 1.38A. 6. What are the four main types of biomolecules? A) Carbohydrates, Proteins, Lipids, Nucleic Acids. B) Carbohydrates, Proteins, Nucleic Acids, Water. C) Vitamins, Minerals, Carbohydrates, Proteins. D) Fats, Sugars, Enzymes, Hormones. Show Answer Correct Answer: A) Carbohydrates, Proteins, Lipids, Nucleic Acids. 7. What liquid detects the presence of an alkene? A) Bromine water. B) Limewater. C) Alkene water. D) Water. Show Answer Correct Answer: A) Bromine water. 8. Enzymes affect the reations in living cells by changing the A) Products. B) Speed of. C) Outcome of the reaction. D) Temperature of hte. Show Answer Correct Answer: B) Speed of. 9. Which of the following statement is correct? A) Alkenes can turn aqueous bromine from colourless to reddish-brown. B) Alkenes can turn aqueous bromine from blue-brown to colourless. C) Alkenes can turn aqueous bromine from green to colourless. D) Alkenes can turn aqueous bromine from reddish-brown to colourless. Show Answer Correct Answer: D) Alkenes can turn aqueous bromine from reddish-brown to colourless. 10. When monomers join together they form ..... A) Polymers. B) Atoms. C) Monomers. D) Elements. Show Answer Correct Answer: A) Polymers. 11. Which among the following is the largest carbohydrate? A) Fructose. B) Sucrose. C) Galactose. D) Glycogen. Show Answer Correct Answer: D) Glycogen. 12. Control rate of reactions: A) Lipids. B) Proteins. C) Nucleic acids. D) Carbohydrates. Show Answer Correct Answer: B) Proteins. 13. Which of the following alcohols has the highest boiling point? A) Methanol. B) Ethanol. C) Buthanol. D) Propanol. Show Answer Correct Answer: C) Buthanol. 14. Which of these functional groups is an Aldehyde? A) -CH3. B) -CHO. C) -COOH. D) -NH2. Show Answer Correct Answer: B) -CHO. 15. How many covalent bonds are there between the carbon atoms in unsaturated hydrocarbons? A) 2. B) 1. C) 3. D) 2 or 3. Show Answer Correct Answer: D) 2 or 3. 16. The names of alkenes end with ..... A) Ene. B) Enes. C) Anes. D) Ane. Show Answer Correct Answer: A) Ene. 17. Name the functional group present in CH3COC2H5 A) Aldehyde. B) Alocohol. C) Carboxylic acid. D) Ketone. Show Answer Correct Answer: D) Ketone. 18. What is the unit for resistance? A) Volts. B) Amperes. C) Ohms. D) None of the above. Show Answer Correct Answer: C) Ohms. 19. Ethene reacts with acidified potassium manganate(VII) solution to form a product.What is the name of this reaction? A) Hydration. B) Hydrogenation. C) Halogenation. D) Oxidation. Show Answer Correct Answer: D) Oxidation. 20. How many carbon atoms are in propane A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: B) 3. 21. Which of the following is NOT produced in a condensation reaction? A) Monomer. B) Polymer. C) Water. D) None of the above. Show Answer Correct Answer: A) Monomer. 22. Why is there a high demand for smaller sized hydrocarbons? A) They are cheaper to produce. B) They combust easily and are used as fuel. C) They are more stable. D) They are easier to transport. Show Answer Correct Answer: B) They combust easily and are used as fuel. 23. What is the functional group of animal fats and vegetable oil? A) Hydroxyl group, -OH. B) Carboxyl group, -COOH. C) Carboxylate group, -COO-. D) None of the above. Show Answer Correct Answer: C) Carboxylate group, -COO-. 24. Enzymes belong to which class of macromolecules? A) Proteins. B) Carbohydrates. C) Nucleic acids. D) Lipids. Show Answer Correct Answer: A) Proteins. 25. What is the name of the reaction when alkenes react with HCl? A) Halogenation. B) Hydrogenation. C) Hydrohalogenation. D) Hydration. Show Answer Correct Answer: C) Hydrohalogenation. 26. What do monomers link together to form? A) Polymers. B) Cells. C) Atoms. D) Molecules. Show Answer Correct Answer: A) Polymers. 27. Homologous series has four features: A) Same functional group. B) Same general formula. C) Same chemical reaction. D) Different physical properties. E) All. Show Answer Correct Answer: E) All. 28. An example of this organic compound or macromolecule would be DNA & RNA: A) Carbohydrate. B) Nucleic Acid. C) Lipid. D) Protein. Show Answer Correct Answer: B) Nucleic Acid. 29. Make up cell membrane and other membranes: A) Nucleic acids. B) Lipids. C) Proteins. D) Carbohydrates. Show Answer Correct Answer: B) Lipids. 30. Peptides are the building blocks of A) Proteins. B) Carbon. C) Covalent bonds. D) Glucose. Show Answer Correct Answer: A) Proteins. 31. What conditions are necessary in the reaction of alkenes with hydrogen? A) 60$^\circ$C, Nickel catalyst. B) Low temperature, Nickel catalyst. C) 600$^\circ$C, High pressure. D) 300$^\circ$C, Iron catalyst. E) 600$^\circ$C, High temperature. Show Answer Correct Answer: A) 60$^\circ$C, Nickel catalyst. 32. Alkanes are also called ..... A) Inorganic carbon compound. B) Unsaturated hydrocarbon. C) Hydroxyl organic compound. D) Saturated hydrocarbon. Show Answer Correct Answer: D) Saturated hydrocarbon. 33. In carbohydrates, what is the ratio of Carbon to hydrogen to oxygen. A) 1:2:1. B) 1:3. C) 1:4:2. D) None of the above. Show Answer Correct Answer: A) 1:2:1. 34. What is the significance of the carbon atom in organic compounds? A) Carbon can form four covalent bonds, allowing for a diverse range of structures and functions in organic molecules. B) Carbon is the most abundant element in the universe, making it essential for life. C) Carbon atoms are always found in a linear arrangement in organic compounds. D) Carbon can only form single bonds, limiting the complexity of organic molecules. Show Answer Correct Answer: A) Carbon can form four covalent bonds, allowing for a diverse range of structures and functions in organic molecules. 35. Ethene gas reacts with water vapour to produce ethanol through hydration reaction. What is the suitable condition for the reaction? A) Temperature:450$^{o}$C, Pressure:200 atm, Catalyst:Iron. B) Temperature:300$^{o}$C, Pressure:1 atm, Catalyst:Iron. C) Temperature:300$^{o}$C, Pressure:60 atm, Catalyst:Phosphoric acid. D) Temperature:180$^{o}$C, Pressure:1 atm, Catalyst:Nickel. Show Answer Correct Answer: C) Temperature:300$^{o}$C, Pressure:60 atm, Catalyst:Phosphoric acid. 36. A single unit or piece that can be bonded to form a larger molecule is called a A) Biomolecule. B) Dimer. C) Polymer. D) Monomer. Show Answer Correct Answer: D) Monomer. 37. They are aliphatic hydrocarbons that contain only single bonds. A) Alkanes. B) Alkenes. C) Alkynes. D) None of the above. Show Answer Correct Answer: A) Alkanes. 38. Which of the following process do not happen in the carbon cycle? A) Decomposition. B) Distillation. C) Combustion. D) Photosynthesis. Show Answer Correct Answer: B) Distillation. 39. Name the group that has a single bond A) Alkenes. B) Alcohols. C) Alkanes. D) Ethers. Show Answer Correct Answer: C) Alkanes. 40. What is the general formula of an alkene? A) C$_{n}$H$_{2n}$. B) C$_{n}$H$_{n}$. C) C$_{n}$H$_{2n+2}$. D) C$_{n}$H$_{2n-2}$. Show Answer Correct Answer: A) C$_{n}$H$_{2n}$. 41. What is the monomer of a carbohydrate called? A) Monosaccharide. B) Glycerol. C) Nucleotide. D) Amino Acid. Show Answer Correct Answer: A) Monosaccharide. 42. Which of the following compounds will be formed when butanone is reduced? A) Butan-2-ol. B) Butanoic acid. C) Butan-1-ol. D) Butanal. Show Answer Correct Answer: A) Butan-2-ol. 43. The windscreen of a car is made of A) PVC. B) Polypropene. C) Perspex. D) Glass. Show Answer Correct Answer: C) Perspex. 44. Balance the equation:C3H8 + O2 $\rightarrow$ CO2 + H2O. A) C3H8 + 4 O2 $\rightarrow$ 2 CO2 + 5 H2O. B) C3H8 + 6 O2 $\rightarrow$ 4 CO2 + 2 H2O. C) C3H8 + 3 O2 $\rightarrow$ 2 CO2 + 3 H2O. D) C3H8 + 5 O2 $\rightarrow$ 3 CO2 + 4 H2O. Show Answer Correct Answer: D) C3H8 + 5 O2 $\rightarrow$ 3 CO2 + 4 H2O. 45. Identify the functional group in alcohols. A) Amino group (-NH2). B) Hydroxyl group (-OH). C) Carbonyl group (C=O). D) Carboxyl group (-COOH). Show Answer Correct Answer: B) Hydroxyl group (-OH). 46. Fractional distillation separates crude oil based on the different ..... of the molecules in the mixture A) Freezing point. B) Chemical reactivity. C) Boiling point. D) Melting point. Show Answer Correct Answer: C) Boiling point. 47. Which of the following is true about organic compounds? A) Is usually metallic. B) Exists in all living things. C) Combines with carbon to release heat. D) Does not originate from living things. Show Answer Correct Answer: B) Exists in all living things. 48. Which of the following is the functional group of an alkene? A) -OH. B) C-C. C) -COOH. D) C=C. Show Answer Correct Answer: D) C=C. 49. What is the molecular formula of butane? A) C3H8. B) C4H10. C) C2H6. D) C5H12. Show Answer Correct Answer: B) C4H10. 50. Which of the following statements are usually correct for carbon compounds? These-(i) are good conductors of electricity(ii) are poor conductors of electricity(iii) have strong forces of attraction between their molecules(iv) do not have strong forces of attraction between their molecules. A) (i) & (iv). B) (ii) & (iv). C) (ii) & (iii). D) (i) & (iii). Show Answer Correct Answer: B) (ii) & (iv). 51. A compound is a substance which contains ..... A) Only one type of atom. B) Only two types of atom. C) Two or more chemicals which can be easily separated. D) Two or more elements chemically joined together. Show Answer Correct Answer: D) Two or more elements chemically joined together. 52. Alkenes burn with more ..... flame compared with alkanes of the same number of carbon atoms because the percentage of carbon by mass in alkenes is ..... A) Sooty, higher. B) Blue, higher. C) Blue, lower. D) Sooty, lower. Show Answer Correct Answer: A) Sooty, higher. 53. A polysaccharide: A) Glucose. B) Starch. C) Enzyme. D) Protein. Show Answer Correct Answer: B) Starch. 54. The product, polyethene, is a A) Gas. B) Solution. C) Solid. D) Liquid. Show Answer Correct Answer: C) Solid. 55. TRUE or FALSE? All of the carbon in existence is continually recycled in the carbon cycle. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 56. A molecule of CO$_{2}$ (carbon dioxide) has- A) 1 single & 1 double bond. B) Only double bonds. C) Only single bonds. D) Only triple bonds. Show Answer Correct Answer: B) Only double bonds. 57. What carbon compounds are used to form bone and muscle? A) Protein. B) Nucleic acids. C) Carbohydrates. D) Lipids. Show Answer Correct Answer: A) Protein. 58. If H2 is added to C$_{4}$H$_{8}$, the product will be C$_{4}$H$_{12}$ A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 59. A long chain of monomers covalently bonded together is a A) Ionic compound. B) Inorganic compound. C) Polymer. D) Salt molecule. Show Answer Correct Answer: C) Polymer. 60. Which process is used to convert vegetable oil to margarine? A) Oxidation. B) Hydrogenation. C) Esterification. D) Hydration. Show Answer Correct Answer: B) Hydrogenation. ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 4 Carbon And Its Compounds Quiz 1Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 2Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 3Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 4Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 5Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 6Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 7Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books