This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A on reaction with sodium in presence of dry ether gives 2, 3 dimethyl butane. what is A? A) 2, 3 dimethyl 1-chloro butane. B) Propanoic acid. C) Isopropyl chloride. D) T-butyl chloride. Show Answer Correct Answer: C) Isopropyl chloride. 2. As the number of carbons increases in the boiling point generally ..... A) Increase. B) Decrease. C) Stay the same. D) Varies. Show Answer Correct Answer: A) Increase. 3. Lignite A) Is a type of hard coal. B) Is a type of brown coal. C) Is a type of natural gas. D) Is a type of oil. Show Answer Correct Answer: B) Is a type of brown coal. 4. Which of the following is a toxic gas released when hydrocarbons undergo incomplete combustion? A) Carbon dioxde. B) Oxygen. C) Carbon monoxide. D) None of the above. Show Answer Correct Answer: C) Carbon monoxide. 5. What type of hydrocarbon is characterized by the presence of a double bond? A) Alkane. B) Alkene. C) Alkyne. D) Aromatic. Show Answer Correct Answer: B) Alkene. 6. Who discovered benzene's stable structure? A) Faraday. B) Lomonosov. C) Kekule. D) Priestley. Show Answer Correct Answer: C) Kekule. 7. The general formulas for alkanes, alkenes and alkynes are: A) Alkane:C$_{n}$H$_{2n+2 }$alkene:C$_{n}$H$_{2n }$alkyne:C$_{n}$H$_{2n-2}$. B) Alkane:C$_{n}$H$_{2n}$alkene:C$_{n}$H$_{2n+2}$alkyne:C$_{n}$H$_{n+4}$. C) Alkane:C$_{n}$H$_{2n-2 }$alkene:C$_{n}$H$_{2n }$alkyne:C$_{n}$H$_{2n+2}$. D) Alkane:C$_{n}$H$_{2n+2 }$alkene:C$_{n}$H$_{2n }$alkyne:C$_{n}$H$_{n-4}$. Show Answer Correct Answer: A) Alkane:C$_{n}$H$_{2n+2 }$alkene:C$_{n}$H$_{2n }$alkyne:C$_{n}$H$_{2n-2}$. 8. A Double Bond ( = ) means a total of how many electrons? A) 1 electron. B) 3 electron. C) 2 electron. D) 4 electrons. Show Answer Correct Answer: D) 4 electrons. 9. Why are hydrocarbons effective as fuel sources? A) They release oxygen when burned. B) They produce large amounts of water vapor. C) They have high boiling points. D) They contain high-energy carbon-carbon bonds. Show Answer Correct Answer: D) They contain high-energy carbon-carbon bonds. 10. What is the process in which synthetic rubber treated with sulfur at high temperature to overcome the weakness of polymer? A) Polymerization. B) Condensation. C) Vulcanization. D) Modification. Show Answer Correct Answer: C) Vulcanization. 11. Substances with benzene-like rings are called ..... A) Circle compounds. B) Aromatic compounds. C) Aldehydes. D) None of the above. Show Answer Correct Answer: B) Aromatic compounds. 12. How do you test for an alkene? A) React it with oxygen. B) React it with litmus paper. C) React it with bromine water. D) PH test. Show Answer Correct Answer: C) React it with bromine water. 13. How many bonds can each carbon atom make? A) 2. B) 1. C) 4. D) 3. Show Answer Correct Answer: C) 4. 14. ALKANE, ALKENE or ALKYNE?Hexyne A) Alkane. B) Alkene. C) Alkyne. D) None of the above. Show Answer Correct Answer: C) Alkyne. 15. Combustion reactions are A) Always exothermic. B) Always endothermic. C) Some times exothermic and some times endothermic. D) No heat involved. Show Answer Correct Answer: A) Always exothermic. 16. The names of all alkenes end with the suffix: A) -ane. B) -hex. C) -ene. D) None of the above. Show Answer Correct Answer: C) -ene. 17. Which type of hydrocarbon contains at least one carbon-carbon triple bond? A) Alkanes. B) Alkenes. C) Alkynes. D) Aromatic hydrocarbons. Show Answer Correct Answer: C) Alkynes. 18. Which of the following statements about benzene is incorrect? A) It contains a ring of delocalised electrons. B) It is very reactive and unstable. C) It has formula C6H6. D) It is very stable and hard to chemically react. Show Answer Correct Answer: B) It is very reactive and unstable. 19. What is meant by a saturated hydrocarbon? A) Contains at least one carbon to carbon double bond. B) Contains only single covalent bonds between the carbon atoms. C) Contains mostly single covalent bonds between the carbon atoms. D) Contains a double covalent bond between the carbon atoms. Show Answer Correct Answer: B) Contains only single covalent bonds between the carbon atoms. 20. In which of the following reactions is oxygen use up? A) Addition. B) Elimination. C) Combustion. D) Substitution. Show Answer Correct Answer: C) Combustion. 21. It is an important part of gasoline fuel for cars, trucks, buses, and the like. A) Octane. B) Ethanol. C) Methanol. D) Benzene. Show Answer Correct Answer: A) Octane. 22. An alkene is a hydrocarbon with A) All single bonds betwee carbon atoms. B) One triple bond between 2 carbon atoms. C) At least one double bond between 2 carbon atoms. D) None of the above. Show Answer Correct Answer: C) At least one double bond between 2 carbon atoms. 23. What alkene has the chemical formula C5H10? A) PENTANE. B) PENTENE. C) CYCLOPENTANE. D) PENTANOL. Show Answer Correct Answer: B) PENTENE. 24. Butane is an alkane with ..... carbon atoms A) 2. B) 3. C) 4. D) 5. Show Answer Correct Answer: C) 4. 25. N-propyl bromide on treating with alcoholic KOH produces A) Propane. B) Propyne. C) Propene. D) Propanol. Show Answer Correct Answer: C) Propene. ← 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