This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which hydrocarbon has a double bond? A) Ethene. B) Butane. C) Cyclohexane. D) Propane. Show Answer Correct Answer: A) Ethene. 2. Which of the following alkane is in gaseous state at room temperature? A) Pentane. B) Butane. C) Hexane. D) Decane. Show Answer Correct Answer: B) Butane. 3. Isomers have A) Same structure and different formula. B) Different formula different structure. C) Same formula different structure. D) Same structure same formula. Show Answer Correct Answer: C) Same formula different structure. 4. True or false:The name of the hydrocarbon can tell you how many carbons it contains A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 5. What gas turns limewater cloudy? A) Oxygen. B) Hydrogen. C) Carbon dioxide. D) None of the above. Show Answer Correct Answer: C) Carbon dioxide. 6. If an alkane has 32 hydrogen atoms, how many carbon atoms does it have? A) 64. B) 66. C) 15. D) 16. Show Answer Correct Answer: C) 15. 7. The dihedral angle in the staggered conformation of C2H6 is A) 120. B) 60. C) 0. D) 90. Show Answer Correct Answer: B) 60. 8. Cyclohexane is the simplest stype of cyclic hydrocarbon and contains only A) Triple bonds. B) Double bonds. C) Single bonds. D) None of the above. Show Answer Correct Answer: C) Single bonds. 9. What is the main natural source of hydrocarbons? A) Crude Oil. B) Sedimentary Rocks. C) Gasoline. D) Polar Ice. Show Answer Correct Answer: A) Crude Oil. 10. How many water molecules are needed to balance the hydrogen atoms in the combustion of a hydrocarbon with eight hydrogen atoms? A) Two. B) Four. C) Six. D) Eight. Show Answer Correct Answer: B) Four. 11. What name is given to reactions, like combustion reactions, which release energy? A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exothermic. 12. Saturated Hydrocarbons contains ..... A) Carbon Only. B) Carbon & Hydrogen. C) Hydrogen Only. D) Other elements than carbon. Show Answer Correct Answer: B) Carbon & Hydrogen. 13. What type of hydrocarbon has the general formula CnH2n? A) Alkane. B) Alkene. C) Alkyne. D) Aromatic. Show Answer Correct Answer: B) Alkene. 14. How do you balance the hydrogen atoms in the combustion of methane? A) Add 2 in front of CH4. B) Add 2 in front of O2. C) Add 2 in front of CO2. D) Add 2 in front of H2O. Show Answer Correct Answer: D) Add 2 in front of H2O. 15. Hydrocarbon refinement A) Separates the oil compoonents by their solubility in water. B) Separates the oil components by their polarity. C) Separates the oil components by their boiling point. D) Separates the oil components by electrical conductivity. Show Answer Correct Answer: C) Separates the oil components by their boiling point. 16. When wood burns in the presences of oxygen, in what form is energy released? A) Heat and light. B) Hydrogen. C) Water vapor. D) More oxygen. Show Answer Correct Answer: A) Heat and light. 17. Amines are organic compounds that can be considered to be derivatives of ammonia, NH$_{3}$. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. ..... is the simplest alkyne. A) Methene. B) Ethene. C) Methyne. D) Ethyne. Show Answer Correct Answer: D) Ethyne. 19. Hydrocarbons are organic compound with elements A) Hydrogen. B) Oxygen. C) Carbon. D) Both hydrogen and carbon. Show Answer Correct Answer: D) Both hydrogen and carbon. 20. Alkyl groups are formed by removing 1 proton. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. What is the name for a group of atoms that attach to the carbon skeleton of an organic molecule and give it certain properties A) Carbon group. B) Periodic group. C) Functional group. D) Element group. Show Answer Correct Answer: C) Functional group. 22. C$_{10}$H$_{22}$ is called: A) Decene. B) Decyne. C) Decane. D) Nonane. Show Answer Correct Answer: C) Decane. 23. ALKANE, ALKENE or ALKYNE?Undecane A) Alkane. B) Alkene. C) Alkyne. D) None of the above. Show Answer Correct Answer: A) Alkane. 24. The name "2-pentene" shows that: A) There are 2 carbon atoms. B) The double bond starts at carbon 2. C) The molecule is branched. D) It is an alkane. Show Answer Correct Answer: B) The double bond starts at carbon 2. 25. What do we use limewater to test for? A) Carbon dioxide. B) Water. C) Heat. D) Smoke. Show Answer Correct Answer: A) Carbon dioxide. ← 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 10Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books