This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When this equation is balanced:C$_{5}$H$_{12}$ + O$_{2}$(g) $\rightarrow$ CO$_{2}$(g) + H$_{2}$O(l)The summation of all coefficients are ..... A) 18. B) 19. C) 20. D) 21. Show Answer Correct Answer: C) 20. 2. Which ONE of the following compounds has the LOWEST melting point? A) Hexane. B) Ethane. C) Butane. D) Octane. Show Answer Correct Answer: B) Ethane. 3. Major component of materials used in certain motor fuels and dry-cleaning solvents A) Hexane. B) Octane. C) Pentane. D) Butane. Show Answer Correct Answer: A) Hexane. 4. CH$_{3 }$-CH = CH$_{2}$ is ..... A) Aliphatic saturated. B) Aliphatic unsaturated. C) Alicyclic saturated. D) Alicyclic unsaturated. Show Answer Correct Answer: B) Aliphatic unsaturated. 5. What are hydrocarbon fuels made of? A) Hydrogen and carbon. B) Helium and carbon. C) Hydrogen and calcium. D) Helium and calcium. Show Answer Correct Answer: A) Hydrogen and carbon. 6. Aliphatic hydrocarbons are nonpolar compounds A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. What are the environmental impacts of hydrocarbon combustion? A) The environmental impacts of hydrocarbon combustion include greenhouse gas emissions, air pollution, and potential ecological damage from extraction processes. B) Hydrocarbon combustion is a renewable energy source. C) It only affects water quality, not air quality. D) Hydrocarbon combustion has no impact on the environment. Show Answer Correct Answer: A) The environmental impacts of hydrocarbon combustion include greenhouse gas emissions, air pollution, and potential ecological damage from extraction processes. 8. Why is the combustion of hydrocarbons so useful in our society? A) Recycles hydrocarbons. B) Produces energy. C) Produces water. D) Produces carbon dioxide. Show Answer Correct Answer: B) Produces energy. 9. Bottled gas for home heating, portable stoves and heaters; refrigerant A) Butane. B) Methane. C) Propane. D) Isobutane. Show Answer Correct Answer: C) Propane. 10. When naming hydrocarbons, we number the carbons so that the position numbers are ..... A) Left to right. B) Depends on the compound. C) The lowest possible. D) The highest possible. Show Answer Correct Answer: C) The lowest possible. 11. The molecular formula below which shown the alkanes compound is ..... A) C$_{2}$H$_{4}$. B) C$_{3}$H$_{7}$. C) C$_{4}$H$_{10}$. D) C$_{5}$H$_{8}$. Show Answer Correct Answer: C) C$_{4}$H$_{10}$. 12. Explain the concept of covalent bonds in hydrocarbons. A) Covalent bonds in hydrocarbons are formed when two atoms share a pair of electrons, resulting in the formation of a stable molecule. B) Covalent bonds in hydrocarbons are formed by the sharing of protons between atoms. C) Covalent bonds in hydrocarbons are formed by the transfer of electrons between atoms. D) Covalent bonds in hydrocarbons are formed by the attraction of opposite charges. Show Answer Correct Answer: A) Covalent bonds in hydrocarbons are formed when two atoms share a pair of electrons, resulting in the formation of a stable molecule. 13. A compound having molecular formula C$_{5}$H$_{12}$ is an ..... A) Alkene. B) Alkyne. C) Alkane. D) None of these. Show Answer Correct Answer: C) Alkane. 14. The root name "meth-" represents a chain of how many C atoms? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: A) 1. 15. What is wrong with the name 1-methyl-3-cyclohexene A) Prefixes. B) Numbering. C) Commas. D) Dashes. Show Answer Correct Answer: B) Numbering. 16. Butene A) C4H8. B) C2H6. C) C3H8. D) C2H4. Show Answer Correct Answer: A) C4H8. 17. What is the general formula of alkanes? A) CnH2n+2. B) CnH2n. C) CnH2n-2. D) CnH2+2. Show Answer Correct Answer: A) CnH2n+2. 18. Which of the following best explains why PbS + PbSO$_{4}$ ==> 2Pb + 2SO$_{2}$ is not a combustion reaction? A) Fuel is not a reactant. B) Molecular oxygen is not a product. C) Molecular oxygen is not a reactant. D) Fuel is not a product. Show Answer Correct Answer: C) Molecular oxygen is not a reactant. 19. Heptane contains the following number of carbons: A) 3. B) 4. C) 9. D) 7. Show Answer Correct Answer: D) 7. 20. X + NaOH ..... $^{CaO}$ ..... benzenewhat is X A) Sodium phenoxide. B) Sodium benzoate. C) Sodium propanoate. D) Chlorobenzene. Show Answer Correct Answer: B) Sodium benzoate. 21. What do we call compounds with the same chemical formula but different structural formulas? A) Isomers. B) Functional groups. C) Ions. D) Metals. Show Answer Correct Answer: A) Isomers. 22. Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of:-(1) an isopropyl group(2) an acetylenic triple bond(3) two ethylenic double bonds(4) a vinyl group A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 23. How many isomers does pentane have? A) 2. B) 3. C) 5. D) 9. Show Answer Correct Answer: C) 5. 24. Which of the following statements concerning the reaction of methane with bromine is/are correct?(1) It is an addition reaction.(2) It is a substitution reaction.(3) A similar reaction will occur if propane is used instead of methane. A) Only. B) Only. C) And (3) only. D) And (3) only. Show Answer Correct Answer: C) And (3) only. 25. What is the name of the family of hydrocarbons with at least one triple bond? A) Alkanes. B) Alkenes. C) Alkynes. D) Cycloalkanes. Show Answer Correct Answer: C) Alkynes. ← PreviousNext →Related QuizzesClass 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 1Class 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 9Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books