This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 18 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What type of hydrocarbon has the general formula CnH2n-2? A) Alkane. B) Alkene. C) Alkyne. D) Aromatic. Show Answer Correct Answer: C) Alkyne. 2. Which of the following hydrocarbons is also known as acetylene? A) Ethane. B) Ethene. C) Ethyne. D) Propane. Show Answer Correct Answer: C) Ethyne. 3. Another term for enantiomers is: A) Optical isomers. B) Structural isomers. C) Cis-trans isomers. D) Optical illusions. Show Answer Correct Answer: A) Optical isomers. 4. Pentane is an alkane with ..... carbon atoms A) 3. B) 5. C) 15. D) 50. Show Answer Correct Answer: B) 5. 5. What is the result of oxidizing carbon and hydrogen atoms during combustion? A) Carbon monoxide and hydrogen. B) Carbon dioxide and water. C) Hydrogen peroxide. D) Ozone and water. Show Answer Correct Answer: B) Carbon dioxide and water. 6. What type of hydrocarbon is saturated? A) Alkane. B) Alkene. C) Alkyne. D) Aromatic. Show Answer Correct Answer: A) Alkane. 7. Which of the following contains hydrocarbons? A) Plastic Toys. B) Fuel. C) Rubber. D) All of these. Show Answer Correct Answer: D) All of these. 8. As the number of carbons increases the viscosity generally ..... A) Increase. B) Decrease. C) Stay the same. D) Varies. Show Answer Correct Answer: A) Increase. 9. Which of these hydrocarbons would react with bromine water? A) Pentane. B) Cyclopropane. C) Ethene. D) Ethane. Show Answer Correct Answer: C) Ethene. 10. Explain the concept of isomerism in hydrocarbons. A) Isomerism in hydrocarbons is the variation in molecular weight among different compounds. B) Isomerism is the process of breaking down hydrocarbons into simpler compounds. C) Isomerism in hydrocarbons is the existence of compounds with the same molecular formula but different structures or arrangements. D) Isomerism refers to the ability of hydrocarbons to form multiple bonds. Show Answer Correct Answer: C) Isomerism in hydrocarbons is the existence of compounds with the same molecular formula but different structures or arrangements. 11. Maya is studying organic chemistry and wants to know the general formula for alkanes. Can you help her? A) CnH(2n+2). B) C(n-1)H(2n-2). C) CnH2n. D) C2nH2n. Show Answer Correct Answer: A) CnH(2n+2). 12. Which of the following energy sources is incorrectly matched? A) Oil-nonrenewable. B) Solar-renewable. C) Wind-renewable. D) Geothermal-nonrenewable. Show Answer Correct Answer: D) Geothermal-nonrenewable. 13. Branches in a hydrocarbon make up which part of the name? A) The suffix. B) The prefix. C) The root. D) Depends on the molecule. Show Answer Correct Answer: B) The prefix. 14. What can you tell about methane (CH$_{4}$) from its molecular formula? A) It contains four carbon atoms. B) It contains one hydrogen atom. C) It contains four hydrogen atoms. D) It forms groups of four molecules. Show Answer Correct Answer: C) It contains four hydrogen atoms. 15. X is organic compound and can make the color of KMnO$_{4}$ disappear. The molecular formula of X is ..... A) C$_{2}$H$_{6}$. B) C$_{2}$H$_{4}$. C) C$_{3}$H$_{8}$. D) C$_{4}$H$_{10}$. Show Answer Correct Answer: B) C$_{2}$H$_{4}$. 16. Propene + Steam would make? A) Propan-1-ol. B) Propan-2-ol. C) Propan-1-ol and propan-3-ol. D) Propan-1-ol and propan-2-ol. Show Answer Correct Answer: D) Propan-1-ol and propan-2-ol. 17. Which of the following is a toxic gas produced during incomplete combustion that reduces the oxygen-carrying capacity of the blood? A) Carbon dioxide. B) Oxides of nitrogen. C) Sulfur dioxide. D) Carbon monoxide. Show Answer Correct Answer: D) Carbon monoxide. 18. A hydrocarbon that contains a double bonds is also known as ..... ? A) Alkane. B) Wet. C) Unsaturated. D) Saturated. Show Answer Correct Answer: C) Unsaturated. 19. Find the reactants in Friedel-Craft's alkylation A) C$_{6}$H$_{6}$ + CH$_{3}$Cl. B) C$_{6}$H$_{6}$ + NH$_{3}$. C) C$_{6}$H$_{6}$ + CH$_{3}$CO. D) C$_{6}$H$_{6}$ + CH$_{3}$COCl. Show Answer Correct Answer: A) C$_{6}$H$_{6}$ + CH$_{3}$Cl. 20. A hydrocarbon containing double or triple bonds is said to be ..... A) Saturated. B) Unsaturated. C) All the above. D) None of the above. Show Answer Correct Answer: B) Unsaturated. 21. How do you name a cyclic alkane? A) Name it based on the longest carbon chain only. B) Add 'cyclic-' before the alkane name. C) Use 'cyclo-' prefix followed by the alkane name based on carbon count. D) Use 'alkane-' prefix followed by the cyclo name. Show Answer Correct Answer: C) Use 'cyclo-' prefix followed by the alkane name based on carbon count. 22. Which of the following is NOT true of coal usage? A) Coal usage consists of burning coal in order to produce steam in order to move a turbine & generate electricity. B) Coal usage is a completely renewable energy source. C) Coal usage results in 2/3 of the energy "lost" as heat = not efficient. D) None of the above. Show Answer Correct Answer: B) Coal usage is a completely renewable energy source. 23. Why are alkynes used in welding torches? A) They are highly flammable. B) They release large amounts of carbon dioxide when burned. C) They have high melting points. D) They produce a hot, intense flame. Show Answer Correct Answer: D) They produce a hot, intense flame. 24. What is the reactivity of alkynes compared to double bonds? A) Alkynes are less reactive. B) Alkynes are inert. C) Alkynes are equally reactive. D) Alkynes are more reactive. Show Answer Correct Answer: D) Alkynes are more reactive. 25. Which of the following is formed in car engines as the temperature reached is high enough to allow nitrogen and oxygen from air to react? It contributes to acid rain. A) Carbon dioxide. B) Oxides of nitrogen. C) Sulfur dioxide. D) Carbon monoxide. Show Answer Correct Answer: B) Oxides of nitrogen. ← 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