This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part Ii > 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 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Hydrocarbons are compounds that contain these elements: A) Carbon and Nitrogen. B) Carbon and Hydrogen. C) Carbon, and Oxygen. D) Carbon, Oxygen, and Hydrogen. Show Answer Correct Answer: B) Carbon and Hydrogen. 2. What percentage of the global energy consumption comes from fossil fuels? A) 25%. B) 50%. C) 95%. D) 84%. Show Answer Correct Answer: D) 84%. 3. Which of the following is the on of the preparation method of acetylene gas? A) From calcium carbide. B) Hydrogenation. C) Cracking reaction. D) Dehydration of alcholes. Show Answer Correct Answer: A) From calcium carbide. 4. Is the name of single bonded, saturated hydrocarbons. A) Alkynes. B) Tanins. C) Alkanes. D) Alkenes. Show Answer Correct Answer: C) Alkanes. 5. It is written in a way the subscript of the element symbol depicts the number of atoms present in the compound? A) Structural Formula. B) Condensed Formula. C) Chemical Formula. D) Molecular Formula. Show Answer Correct Answer: D) Molecular Formula. 6. Which type of hydrocarbon contains at least one carbon-carbon double bond? A) Alkynes. B) Aromatic hydrocarbons. C) Alkanes. D) Alkenes. Show Answer Correct Answer: D) Alkenes. 7. Hydrocarbons with double or triple bonds are said to be A) Saturated. B) Unsaturated. C) Supersaturated. D) None of the above. Show Answer Correct Answer: B) Unsaturated. 8. What is the name of the third member of alkenes? A) Butene. B) Propyne. C) Propene. D) Propane. Show Answer Correct Answer: A) Butene. 9. Is the simplest of alkenes. A) Pentene. B) Propene. C) Ethene. D) Buthene. Show Answer Correct Answer: C) Ethene. 10. Compounds in a homologous series will have the same A) General formula. B) Atoms. C) Functional group. D) All of the above. Show Answer Correct Answer: D) All of the above. 11. True or false-burning is a chemical reaction A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 12. Which of the following is correct about structural isomers? A) They have different molecular formulas. B) They must have the same length main chain. C) They must have any double or triple bonds in the same position. D) They can be either positional or chain isomers. Show Answer Correct Answer: D) They can be either positional or chain isomers. 13. What is the ending for hydrocarbons with only C-C single bonds? A) -ene. B) -yne. C) -one. D) -ane. Show Answer Correct Answer: D) -ane. 14. What is isomerism in hydrocarbons? A) Isomerism is the process of breaking down hydrocarbons into simpler compounds. B) Isomerism in hydrocarbons means having different molecular formulas for the same compound. 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. 15. In the hydroboration-oxidation reaction of propene with diborane, H$_{2}$O$_{2}$ and NaOH, the organic compound formed is:(1) CH$_{3}$CH$_{2}$CH$_{2}$OH( 2) (CH$_{3}$)$_{3}$COH(3) CH$_{3}$CHOHCH$_{3}$(4) CH$_{3}$CH$_{2}$OH A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: D) 1. 16. Crude oil and what are natural resources formed from the ancient remains of microscopic animals and plants? A) Natural gas. B) Sand. C) Rock. D) Fossils. Show Answer Correct Answer: A) Natural gas. 17. What is the name of a branch group that has 4 C atoms? A) Methyl. B) Ethyl. C) Propyl. D) Butyl. Show Answer Correct Answer: D) Butyl. 18. Which is the general formula of cycloalkane? A) C$_{n}$H$_{2n}$. B) C$_{n}$H$_{2n+1}$OH. C) C$_{n}$H$_{2n}$. D) C$_{n}$H$_{2n+2}$. Show Answer Correct Answer: A) C$_{n}$H$_{2n}$. 19. The representation by which lines depict two-electron bonds between atoms. A) Chemical Formula. B) Structural Formula. C) Condensed Fornula. D) Molecular Formula. Show Answer Correct Answer: B) Structural Formula. 20. When ethene gas was passed through a hot potassium manganite (VII) solution, the product formed was A) HCOCH$_{3}$. B) CH$_{3}$CH$_{2}$OH. C) (CH$_{2}$OH)$_{2}$. D) CO$_{2 }$and H$_{2}$O. Show Answer Correct Answer: D) CO$_{2 }$and H$_{2}$O. 21. Hydrocarbons can only have a limited number of carbon atoms, true or false? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 22. Combustion is a scientific term for ..... A) Burning. B) Dissolving. C) Rusting. D) None of the above. Show Answer Correct Answer: A) Burning. 23. What type of combustion produces a yellow flame? A) Incomplete. B) Complete. C) All the above. D) None of the above. Show Answer Correct Answer: A) Incomplete. 24. Which is NOT correct for types of reaction? A) 2C$_{6}$H$_{14 }$ + 13O$_{2}$ $\rightarrow$ 12CO$_{2}$ + 14H$_{2}$O (Combustion). B) C$_{6}$H$_{14}$ + Br$_{2}$ $\rightarrow$ C$_{6}$H$_{13}$Br + HBr (Addition). C) 3C$_{6}$H$_{12}$ + 2KMnO$_{4}$ $\rightarrow$ 3C$_{6}$H$_{14}$O$_{2}$ + 2MnO$_{2}$ + 2KOH (Oxidation). D) C$_{6}$H$_{12}$ + Br$_{2}$ $\rightarrow$ C$_{6}$H$_{12}$Br$_{2}$ (Addition). Show Answer Correct Answer: B) C$_{6}$H$_{14}$ + Br$_{2}$ $\rightarrow$ C$_{6}$H$_{13}$Br + HBr (Addition). 25. Which hydrocarbon is known for its aromatic properties? A) Benzene. B) Cyclohexane. C) Propylene. D) Hexane. Show Answer Correct Answer: A) Benzene. 26. What is meant by an unsaturated hydrocarbon? A) Contain at least one carbon to carbon double bond or a carbon to carbon triple bond. B) Contain only carbon to carbon single bonds. C) Contain only carbon to carbon double bonds. D) Contain at least two carbon to carbon double bond or a carbon to carbon triple bond. Show Answer Correct Answer: A) Contain at least one carbon to carbon double bond or a carbon to carbon triple bond. 27. When a hydrocarbon burns in a plentiful supply of oxygen what are the products? A) Carbon dioxide only. B) Water only. C) Carbon dioxide and water. D) Carbon only. Show Answer Correct Answer: C) Carbon dioxide and water. 28. The products of the combustion reaction are bubbled through limewater. Which gas is limewater used to test for? A) Hydrogen. B) Oxygen. C) Carbon dioxide. D) Chlorine. Show Answer Correct Answer: C) Carbon dioxide. 29. The second name of aromatic hydrocarbons: A) Alkynes. B) Arenes. C) Alkenes. D) Alkanes. Show Answer Correct Answer: B) Arenes. 30. In the combustion equation for a hydrocarbon with three carbon atoms, how many CO2 molecules are needed to balance carbon atoms? A) Four. B) Two. C) Three. D) Five. Show Answer Correct Answer: C) Three. ← PreviousRelated QuizzesScience QuizzesClass 11 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books