This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 13 Hydrocarbons Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Pentane A) C5H12. B) C4H10. C) C6H14. D) C3H8. Show Answer Correct Answer: A) C5H12. 2. How do covalent bonds contribute to the stability of hydrocarbons? A) Sharing electrons between atoms to create a strong bond. B) Causing repulsion between atoms. C) Donating electrons to other atoms. D) Creating weak bonds between atoms. Show Answer Correct Answer: A) Sharing electrons between atoms to create a strong bond. 3. Is the name of doubled bonded, unsaturated hydrocarbons. A) Alkanes. B) Alkenes. C) Allkynes. D) Tanins. Show Answer Correct Answer: B) Alkenes. 4. One Bond(-) means A) 1 electron. B) 3 electron. C) 2 electron. D) 1 x 2 e + 1e. Show Answer Correct Answer: C) 2 electron. 5. Both ethane and ethene can react with bromine. Choose the FALSE statement. A) Ethane reacts by free radical substitution. B) Ethene reacts by addition. C) Hydrogen bromide gas is released with ethane. D) Ethene can only react in the presence of light. Show Answer Correct Answer: D) Ethene can only react in the presence of light. 6. In benzene sulphonic acid, the sulphonic group is attached with the benzene ring through which element? A) Oxygen. B) Hydrogen. C) Sulphur. D) None of the above. Show Answer Correct Answer: C) Sulphur. 7. Solvent; measuring column in low-temperature thermometers A) Pentane. B) Hexane. C) Octane. D) Butane. Show Answer Correct Answer: A) Pentane. 8. During the process of fractional distillation, the fractions are separated according to the difference in their ..... A) Boiling point. B) Density. C) Unsaturation. D) Mass. Show Answer Correct Answer: A) Boiling point. 9. Name the first three alkanes in the homologous series. A) Methane, Ethane, Propane. B) Methanol, Ethanol, Propanol. C) Butane, Pentane, Hexane. D) Acetylene, Benzene, Toluene. Show Answer Correct Answer: A) Methane, Ethane, Propane. 10. In organic chemistry, hyphens are used to separate ..... A) Numbers from numbers. B) Names from numbers. C) All the above. D) None of the above. Show Answer Correct Answer: B) Names from numbers. 11. What is the general molecular formula of alkenes? A) C$_{n}$H$_{2n+2}$. B) C$_{n}$H$_{2n+1}$. C) C$_{n}$H$_{2n}$. D) C$_{n}$H$_{2n+3}$. Show Answer Correct Answer: C) C$_{n}$H$_{2n}$. 12. Both alkanes and alkenes react rapidly with aqueous bromine at room temperature. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. ALKANE, ALKENE or ALKYNE?Pentyne A) Alkane. B) Alkene. C) Alkyne. D) None of the above. Show Answer Correct Answer: C) Alkyne. 14. Ethyl benzene cannot be prepared by A) Clemmensen reduction. B) Wurtz reaction. C) Wurtz-fitig reaction. D) Friedel-crafts reaction. Show Answer Correct Answer: B) Wurtz reaction. 15. What is the chemical formula of benzene? A) CH4. B) C6H6. C) C2H6. D) C2H5OH. Show Answer Correct Answer: B) C6H6. 16. Incomplete combustion is when there is a limited amount of oxygen. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. Which of the following would have the highest viscosity? A) C$_{3}$H$_{8}$. B) C$_{4}$H$_{8}$. C) C$_{5}$H$_{12}$. D) C$_{22}$H$_{44}$. Show Answer Correct Answer: D) C$_{22}$H$_{44}$. 18. What must methane be combined with to undergo a combustion reaction? A) Carbon dioxide. B) Energy. C) Oxygen. D) Hydrogen. Show Answer Correct Answer: C) Oxygen. 19. In the presence of peroxide, HCl and HI do not give anti-Markovnikov's addition to alkenes because(1) All the steps are exothermic in HCl and HI(2) One of the steps is endothermic in HCl and HI(3) HCl is oxidizing and the HI is reducing(4) Both HCl and HI are strong acids A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 20. Hydrocarbon chains should be numbered: A) From left to right. B) From right to right. C) Depending on where the closest double bond is located. D) None of the above. Show Answer Correct Answer: C) Depending on where the closest double bond is located. 21. Which alkane has the LOWEST boiling point? A) Butane. B) Nonane. C) Octane. D) Hexane. Show Answer Correct Answer: A) Butane. 22. 2-ethyl, 3-methylhex-2-ene has how many carbon atoms? A) 8. B) 7. C) 6. D) 5. Show Answer Correct Answer: A) 8. 23. What is the affect of greater branching in alkanes? A) Makes it a saturated hydrocarbon. B) Decreases boiling point. C) Increases its odor. D) Increases boiling point. Show Answer Correct Answer: B) Decreases boiling point. 24. Which of the following shows propagation step A) Cl$_{2}$ 2Cl$^{.}$. B) Cl$^{.}$+Cl$^{.}$ Cl$_{2}$. C) Cl$^{.}$+ CH$_{4}$ CH$_{3}$$^{.}$+HCl. D) Cl$^{.}$+CH$_{3}$$^{.}$ CH$_{3}$Cl. Show Answer Correct Answer: C) Cl$^{.}$+ CH$_{4}$ CH$_{3}$$^{.}$+HCl. 25. The gas liberated by the electrolysis of Dipotassium succinate solution is:(1) Ethyne(2) Ethene(3) Propene(4) Ethane A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. ← 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