This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part Ii > Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Alkynes contain how many bonds between two carbon atoms? A) One. B) Three. C) Four. D) Two. Show Answer Correct Answer: B) Three. 2. The product formed in the reaction of toluene with a molecule of chlorine in the presence of FeCl$_{3}$ is A) Benzene chloride. B) O-and p-chlorotoluene. C) Toluene. D) Methylchloride. Show Answer Correct Answer: B) O-and p-chlorotoluene. 3. Which of the following compounds is the correct molecular formula of pentane? A) C6H14. B) C5H12. C) CH3CH2CH2CH2CH2CH3. D) CH4. Show Answer Correct Answer: B) C5H12. 4. What does incomplete combustion produce that complete combustion doesn't? A) Carbon monoxide. B) Water. C) Carbon dioxide. D) None of the above. Show Answer Correct Answer: A) Carbon monoxide. 5. What is carbon monoxide? A) A toxic gas. B) A large solid. C) All the above. D) None of the above. Show Answer Correct Answer: A) A toxic gas. 6. What is the exam definition of saturated? A) No single bonds. B) Contains a double bond. C) No single bonds, all double bonds. D) No double bonds, all single bonds. Show Answer Correct Answer: D) No double bonds, all single bonds. 7. ALKANE, ALKENE or ALKYNE?Decene A) Alkane. B) Alkene. C) Alkyne. D) None of the above. Show Answer Correct Answer: B) Alkene. 8. WHICH of the following is not an isomer of C$_{7}$H$_{16}$ A) 2, 3 dimethyl pentane. B) 2, 2, 3 trimethylbutane. C) 3-isopropyl pentane. D) 3-methylhexane. Show Answer Correct Answer: C) 3-isopropyl pentane. 9. Which of the following is NOT a use of crude oil? A) Fuels for vehicles. B) Feedstock. C) Domestic heating. D) None of the above. Show Answer Correct Answer: C) Domestic heating. 10. Which of the following does not contain only carbon and hydrogen A) Alkanols. B) Alkynes. C) Alkanes. D) Alkenes. Show Answer Correct Answer: A) Alkanols. 11. The alkanes which will have the highest boiling point is ..... A) 2, 3-dimethylpropane. B) N-pentane. C) N-hexane. D) 2-methylbutane. Show Answer Correct Answer: C) N-hexane. 12. What is used to test for saturation/ unsaturation? A) Iodine solution. B) Bromine acid. C) Potassium permanganate. D) Bromine water. Show Answer Correct Answer: D) Bromine water. 13. Is the simplest of alkynes. A) Pentyne. B) Propyn. C) Ethyne. D) Butyn. Show Answer Correct Answer: C) Ethyne. 14. Which rule is applied FIRST when naming hydrocarbons? A) Identify substituents. B) Name the functional group. C) Number the carbon chain. D) Find the longest continuous carbon chain. Show Answer Correct Answer: D) Find the longest continuous carbon chain. 15. What physical property allows Fractional Distillation to separate different fractions of crude oil? A) Melting point. B) Boiling point. C) Diffusion rate. D) Condensation rate. Show Answer Correct Answer: B) Boiling point. 16. Which of the following has the highest viscosity A) Biodiesel. B) LPG. C) Petrol. D) Diesel. Show Answer Correct Answer: A) Biodiesel. 17. What is an isomer? A) Compounds with different molecular formula and same structural formula. B) Compounds with same molecular formula and same structural formula. C) Compounds with same molecular formula and different structural formula. D) Compounds with different molecular formula and different structural formula. Show Answer Correct Answer: C) Compounds with same molecular formula and different structural formula. 18. What type of bonds are present in alkanes? A) Single bonds. B) Double bonds. C) Triple bonds. D) Both double and triple bonds. Show Answer Correct Answer: A) Single bonds. 19. What is the purpose of cracking in the petroleum industry? A) To combine smaller hydrocarbon molecules into larger, less valuable molecules. B) To separate hydrocarbon molecules from impurities. C) To break down larger hydrocarbon molecules into smaller, more valuable molecules. D) To increase the viscosity of petroleum products. Show Answer Correct Answer: C) To break down larger hydrocarbon molecules into smaller, more valuable molecules. 20. What elements make up a hydrocarbon? A) Carbon and hydrogen. B) Hydrogen and oxygen. C) Oxygen and carbon. D) Only carbon. Show Answer Correct Answer: A) Carbon and hydrogen. 21. Alkene + W $\rightarrow$ diol. W could be A) Hot potassium manganite (VII) solution. B) Cold potassium manganite (VII) solution. C) Cold basic potassium manganite (VII) solution. D) Hot acidified potassium manganite (VII) solution. Show Answer Correct Answer: C) Cold basic potassium manganite (VII) solution. 22. Is it possible to form organic compounds from inorganic reactants? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 23. As the number of carbons increases the flammability generally ..... A) Varies. B) Stay the same. C) Increase. D) Decrease. Show Answer Correct Answer: D) Decrease. 24. What is required for complete combustion to occur? A) Unlimited hydrocarbons. B) Limited hydrocarbons. C) Unlimited oxygen. D) Limited oxygen. Show Answer Correct Answer: C) Unlimited oxygen. 25. What is the name of the family of hydrocarbons with at least one double bond? A) Alkynes. B) Alkenes. C) Alkanes. D) Cycloalkanes. Show Answer Correct Answer: B) Alkenes. 26. Di bawah ini, manakah bensin yang PALING ramah lingkungan? A) Premium. B) Pertamax Plus. C) Pertalite. D) Pertamax. Show Answer Correct Answer: B) Pertamax Plus. 27. Among the following compounds the one that is most reactive towards electrophilic nitration is A) Nitrobenzene. B) Benzene. C) Benzoic acid. D) Toluene. Show Answer Correct Answer: D) Toluene. 28. ..... are hydrocarbons that contain double covalent bonds A) Alkanes. B) Alkynes. C) Alkenes. D) None of the above. Show Answer Correct Answer: C) Alkenes. 29. When the ring on a Bunsen burner is closed during a combustion reaction, soot forms. Soot is? A) Carbon monoxide. B) Carbon dioxide. C) Burnt propane. D) Carbon. Show Answer Correct Answer: D) Carbon. 30. What is the term for hydrocarbons that contain at least one carbon-carbon double or triple bond? A) Aliphatic hydrocarbons. B) Saturated hydrocarbons. C) Unsaturated hydrocarbons. D) Aromatic hydrocarbons. Show Answer Correct Answer: C) Unsaturated hydrocarbons. 31. Cyclobutane is an isomer of butene TRUE OR FALSE A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 32. In the ball and stick models we looked at in class, what atom did the black spheres represent? A) Oxygen. B) Carbon. C) Hydrogen. D) None of the above. Show Answer Correct Answer: B) Carbon. 33. What type of hydrocarbon contains a benzene ring? A) Alkene. B) Aromatic. C) Alkane. D) Alkyne. Show Answer Correct Answer: B) Aromatic. 34. How many carbon atoms are in butene? A) 3. B) 2. C) 1. D) 4. Show Answer Correct Answer: D) 4. 35. What is the difference between alkanes and alkenes? A) Alkanes have a higher number of carbon atoms than alkenes. B) The presence of triple bonds in alkenes. C) The presence of double bonds in alkenes. D) Alkenes are more reactive than alkanes. Show Answer Correct Answer: C) The presence of double bonds in alkenes. 36. Unsaturated hydrocarbons must contain at least one ..... or ..... bond. A) Double or triple. B) Single or triple. C) Single or quadruple. D) Single or double. Show Answer Correct Answer: A) Double or triple. 37. In the initiation step of free radical substitution reaction, halogen molecules undergo heterolytic cleavage. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 38. WHICH OF THE FOLLOWING HYDROCARBONS WILL DECOLOURISE BROMINE SOLUTION? A) PROPANE. B) CYCLOPROPANE. C) PROPENE. D) None of the above. Show Answer Correct Answer: C) PROPENE. 39. Hydrocarbons with only single covalent bonds are known as? A) Alkanes. B) Alkenes. C) Alkynes. D) None of the above. Show Answer Correct Answer: A) Alkanes. 40. What is the process of breaking down hydrocarbons called? A) Cracking. B) Fermentation. C) Hydrolysis. D) Polymerization. Show Answer Correct Answer: A) Cracking. 41. Which of the following is a free radical substitution reaction? A) Hydrogenation of alkanes. B) Combustion of alkanes. C) Halogenation of alkanes. D) Hydrolysis of alkanes. Show Answer Correct Answer: C) Halogenation of alkanes. 42. What is the significance of the longest carbon chain in naming hydrocarbons? A) The longest carbon chain defines the base name and structure of the hydrocarbon. B) The longest carbon chain is irrelevant in naming hydrocarbons. C) The longest carbon chain indicates the boiling point of the hydrocarbon. D) The longest carbon chain determines the molecular weight of the hydrocarbon. Show Answer Correct Answer: A) The longest carbon chain defines the base name and structure of the hydrocarbon. 43. What is the molecular formula of the functional group ethyl? A) CH3. B) C2H6. C) CH2CH3. D) CH5. Show Answer Correct Answer: C) CH2CH3. 44. ALKANE, ALKENE or ALKYNE?Octyne A) Alkane. B) Alkene. C) Alkyne. D) None of the above. Show Answer Correct Answer: C) Alkyne. 45. How does the presence of double bonds affect the naming of alkenes? A) Alkenes are named with the suffix '-ane'. B) Double bonds require the suffix '-ene' and the position of the double bond must be indicated. C) The position of the double bond is not important in naming. D) Double bonds are ignored in naming alkenes. Show Answer Correct Answer: B) Double bonds require the suffix '-ene' and the position of the double bond must be indicated. 46. Which group will have the highest boiling points and melting points for similarly sized molecules? A) Alkenes. B) Alkanes. C) Ethers. D) Alcohols. Show Answer Correct Answer: D) Alcohols. 47. Hydrogenation conditions are ..... A) Powdered nickel catalyst, heat, pressure of 5ATM. B) Powdered nickel catalyst, room temperature and pressure. C) Water as steam, high pressure, with a silica catalyst. D) Aqueous hydrogen bromide. Show Answer Correct Answer: A) Powdered nickel catalyst, heat, pressure of 5ATM. 48. Which branched chain isomer of the hydrocarbon with molecular mass 72 u gives only one isomer of mono substituted alkyl halide?(1) Neopentane(2) Isohexane(3) Neohexane(4) Tertiary butyl chloride A) 2. B) 3. C) 4. D) 1. Show Answer Correct Answer: D) 1. 49. Is the first step to name a Hydricarbons A) Number the branches. B) Number the carbons. C) Find the longest/main chain. D) Name the branches. Show Answer Correct Answer: C) Find the longest/main chain. 50. Berapa harga pertamax per liternya di Batam tahun 2021 ini? (Hayo yang sering isi bensin di SPBU) A) Rp. 8500. B) Rp. 8000. C) Rp.9000. D) Rp.9500. Show Answer Correct Answer: D) Rp.9500. 51. Organic or Inorganic:Uric Acid $C_5H_4N_4O_3$ A) Organic. B) Inorganic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Organic. 52. Alkenes are characterized by which of the following? A) Double bonds. B) A benzene ring. C) One or more triple bonds. D) Only single bonds. Show Answer Correct Answer: A) Double bonds. 53. Which of the following is a characteristic of alkanes? A) They are generally highly reactive. B) They have a triple bond between carbon atoms. C) They are saturated hydrocarbons. D) They readily undergo addition reactions. Show Answer Correct Answer: C) They are saturated hydrocarbons. 54. How do cycloalkanes differ from linear alkanes? A) Cycloalkanes contain more carbon atoms than linear alkanes. B) Cycloalkanes are more stable than linear alkanes. C) Cycloalkanes have a ring structure, whereas linear alkanes have a straight chain structure. D) Linear alkanes have a branched structure, while cycloalkanes do not. Show Answer Correct Answer: C) Cycloalkanes have a ring structure, whereas linear alkanes have a straight chain structure. 55. Pentane has a higher boiling point than ethane because it forms: A) A stronger type of secondary force between molecules. B) The same number of dispersion forces between molecules, but the individual dispersion forces are stronger. C) Stronger overall dispersion forces due to an increased number of electrons in the molecule. D) Stronger overall dispersion forces due to an increased number of hydrogen atoms in the molecule. Show Answer Correct Answer: C) Stronger overall dispersion forces due to an increased number of electrons in the molecule. 56. What is the effect of a higher octane number on gasoline engine performance? A) Increased fuel efficiency. B) Increased knock resistance. C) Reduced fuel efficiency. D) Reduced knock resistance. Show Answer Correct Answer: B) Increased knock resistance. 57. Identify the main characteristics of an organic compound A) Low melting point. B) Nonpolar. C) Non-conductor. D) All of the above. Show Answer Correct Answer: D) All of the above. 58. What is the process of fractional distillation used for in the petroleum industry? A) To extract water from crude oil. B) To create electricity from crude oil. C) To turn crude oil into plastic. D) To separate crude oil into its various components based on their different boiling points. Show Answer Correct Answer: D) To separate crude oil into its various components based on their different boiling points. 59. Produces water and carbon dioxide A) Combustion. B) Complete combustion. C) Gas. D) Incomplete combustion. Show Answer Correct Answer: B) Complete combustion. 60. A dibromo derivatives of alkane react with sodium metal to form an alicyclic hydrocarbon. The derivative is A) 1, 4-dibromobutane. B) 1, 1-dibromopropane. C) 1, 2-dibromoethane. D) 2, 2-dibromobutane. Show Answer Correct Answer: A) 1, 4-dibromobutane. Next →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 2Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 3Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 4Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 5Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 6Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 7Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 8Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books