This quiz works best with JavaScript enabled. Home > Class 10 > Class 10 Science Chapter 4 Carbon And Its Compounds – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following factors is LEAST likely to affect the activity of an enzyme A) PH level. B) Ambient temperature. C) Type of substrate it binds to. D) All three equally affect the activity of an enzyme. Show Answer Correct Answer: C) Type of substrate it binds to. 2. Which of the following is not true about characteristics of alcohol? A) It dissolves in water. B) It is blue in colour. C) It is flammable. D) It is a good fuel as it does not produce black soot. Show Answer Correct Answer: B) It is blue in colour. 3. If the plant population decreased, the amount of carbon would ..... A) Stay the same. B) Increase. C) Decrease. D) None of the above. Show Answer Correct Answer: B) Increase. 4. Ethanol reacts with sodium to produce A) Ethanoic acid. B) Ethene. C) Sodium ethoxide. D) Sodium ethanoate. Show Answer Correct Answer: C) Sodium ethoxide. 5. General formula of Alkane is A) C$_{n}$H$_{2n+2}$. B) C$_{n}$H$_{2n}$. C) C$_{n}$H$_{2n+1}$OH. D) C$_{n}$H$_{2n+1}$COOH. Show Answer Correct Answer: A) C$_{n}$H$_{2n+2}$. 6. Which of the following is an example of saturated hydrocarbon? A) Ethene. B) Propane. C) Butene. D) Pentene. Show Answer Correct Answer: B) Propane. 7. What are the products of complete combustion of hydrocarbons? A) Oxygen (O2) and nitrogen (N2). B) Methane (CH4) and ammonia (NH3). C) Carbon monoxide (CO) and hydrogen (H2). D) Carbon dioxide (CO2) and water (H2O). Show Answer Correct Answer: D) Carbon dioxide (CO2) and water (H2O). 8. What is present in proteins but not in carbohydrates and lipids? A) Carbon. B) Nitrogen. C) Oxygen. D) Phosphorus. Show Answer Correct Answer: B) Nitrogen. 9. Organic molecules that always contain carbon, oxygen and hydrogen, often in a 1:2:1 ratio A) Carbohydrates. B) Functional groups. C) Enyzme. D) Monosaccaride. Show Answer Correct Answer: A) Carbohydrates. 10. Which of these isn't a fraction produce through fractional distillation? A) Bitumen. B) Naptha. C) Fuel oil. D) Ethanol. Show Answer Correct Answer: D) Ethanol. 11. Oils and fats are esters. They are formed when fatty acids and glycerol reacts with each other. The process is known as? A) Combustion. B) Coagulation. C) Esterification. D) Neutralisation. Show Answer Correct Answer: C) Esterification. 12. List two physical properties of alkanes. A) Decreasing density with molecular weight. B) Low melting points compared to other hydrocarbons. C) 1. Boiling points increase with molecular weight; 2. Insoluble in water. D) High solubility in water. Show Answer Correct Answer: C) 1. Boiling points increase with molecular weight; 2. Insoluble in water. 13. The tough exoskeleton of arthropods like lobster and crabs are made of chitin. It provides structure and rigidity in the animal. Chitin is an example of which macromolecule? A) Proteins. B) Nucleic acids. C) Lipids. D) Carbohydrates. Show Answer Correct Answer: D) Carbohydrates. 14. Which of the following is NOT a use of carbohydrates? A) Main source of energy. B) Structural purposes. C) Hormone production. D) DNA synthesis. Show Answer Correct Answer: C) Hormone production. 15. From which of the following substance pencil lead is formed? A) Charcoal. B) Wood. C) Lead. D) Graphite. Show Answer Correct Answer: D) Graphite. 16. A hydrocarbon is an organic that contains carbon, hydrogen, and oxygen. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 17. What type of compound is this C6H12O6 commonly known as table sugar? A) Inorganic. B) Organic. C) Reactive. D) A crystal. Show Answer Correct Answer: B) Organic. 18. Which of the following best describes the composition of a nucleotide? A) A pair of six-carbon rings attached to each other. B) A carbon atom joined to hydrogen and three functional groups. C) A chain of carbon atoms with a carboxyl group bonded to one end. D) A five-carbon sugar attached to a phosphate group and a nitrogenous base. Show Answer Correct Answer: D) A five-carbon sugar attached to a phosphate group and a nitrogenous base. 19. Enzymes affect the reactions in living cell by changing the? A) Products. B) Speed of the reaction. C) Temperature of the reaction. D) Outcome of the reaction. Show Answer Correct Answer: B) Speed of the reaction. 20. What is produced during the cracking process? A) Large hydrocarbons. B) Smaller hydrocarbons like petrol. C) Only gases. D) Only solid hydrocarbons. Show Answer Correct Answer: B) Smaller hydrocarbons like petrol. 21. What is the difference between fats and oils? A) Fats are esters, oils are carboxylic acid. B) Fats are solid, oil are liquids. C) Fats have lower melting point than oil. D) Fats found in plants, oils found in animals. Show Answer Correct Answer: B) Fats are solid, oil are liquids. 22. What is the primary structure of a protein? A) The first level of protein organization, defined by the unique linear sequence of amino acids in a polypeptide chain. B) The three-dimensional shape of a protein formed by the folding of the polypeptide chain. C) The arrangement of multiple polypeptide chains in a protein complex. D) The specific sequence of nucleotides in a DNA molecule. Show Answer Correct Answer: A) The first level of protein organization, defined by the unique linear sequence of amino acids in a polypeptide chain. 23. How many hydrogen atoms are in butane A) 4. B) 6. C) 8. D) 10. Show Answer Correct Answer: D) 10. 24. Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid? A) CH3COOH. B) CH3CH2OH. C) CH3OH. D) CH3CHO. Show Answer Correct Answer: A) CH3COOH. 25. Which of the following is NOT a source of hydrocarbons? A) Coal. B) Petroleum. C) Natural gas. D) Hot spring. Show Answer Correct Answer: D) Hot spring. ← PreviousNext →Related 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 8Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 9Class 10 Science Chapter 4 Carbon And Its Compounds Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books