This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which type of nucleophilic substitution is favored by tertiary haloalkanes? A) E2. B) SN2. C) E1. D) SN1. Show Answer Correct Answer: D) SN1. 2. How can haloalkanes be synthesized from alcohols? A) By oxidizing alcohols with potassium permanganate. B) Haloalkanes can be synthesized from alcohols by reacting them with hydrogen halides or using reagents like SOCl2 or PBr3. C) By polymerizing alcohols with ethylene. D) By heating alcohols with sodium chloride. Show Answer Correct Answer: B) Haloalkanes can be synthesized from alcohols by reacting them with hydrogen halides or using reagents like SOCl2 or PBr3. 3. Name the following haloalkane:CH3CH2CH2I A) 2-iodopropane. B) 3-iodopropane. C) 1-iodopropane. D) 1-iodobutane. Show Answer Correct Answer: C) 1-iodopropane. 4. The synthesis of alkyl fluoride is best accomplished by:(JEE 2015 C) A) Finkelstein reaction. B) Swarts reaction. C) Free radical fluorination. D) Sandmeyer's reaction. Show Answer Correct Answer: B) Swarts reaction. 5. What is the rate-determining step in an SN1 reaction? A) The nucleophile attacking the substrate. B) The formation of the carbocation intermediate. C) The formation of a transition state. D) The leaving group departing from the substrate. Show Answer Correct Answer: B) The formation of the carbocation intermediate. 6. Give the reaction conditions for dow's processes A) NaOH, 623K, 300atm in Basic medium. B) NaOH, 443K, 300atm in acidic medium. C) NaOH, 623K, 300atm in acidic medium. D) NaOH, 368K, 300atm in Basic medium. Show Answer Correct Answer: C) NaOH, 623K, 300atm in acidic medium. 7. What is the role of a leaving group in nucleophilic substitution reactions? A) The leaving group has no impact on the reaction mechanism. B) The leaving group must be a strong nucleophile. C) Leaving groups only affect the final product of the reaction. D) A good leaving group facilitates the reaction by stabilizing the transition state. Show Answer Correct Answer: D) A good leaving group facilitates the reaction by stabilizing the transition state. 8. Assertion:The Friedel-Crafts alkylation is a method to prepare haloarenes. Reason:This reaction involves the introduction of an alkyl group into the aromatic ring. A) True, True. B) False, True. C) False, False. D) True, False. Show Answer Correct Answer: B) False, True. 9. Give the reaction conditions when chlorobenze react to sodium hydroxide to give nucleophilic substitution reaction. A) NaOH, 623K, 300atm in Basic medium. B) NaOH, 443K, 300atm in acidic medium. C) NaOH, 623K, 300atm in acidic medium. D) NaOH, 368K, 300atm in Basic medium. Show Answer Correct Answer: C) NaOH, 623K, 300atm in acidic medium. 10. What is the effect of branching on the boiling point of haloalkanes? A) Branching has no effect on the boiling point of haloalkanes. B) Branching lowers the boiling point of haloalkanes. C) Branching increases the boiling point of haloalkanes. D) Branching makes haloalkanes boil at a constant temperature. Show Answer Correct Answer: B) Branching lowers the boiling point of haloalkanes. 11. When chlorobenzene is treated with Na in dry ether, the product formed is: A) Biphenyl. B) Benzene. C) Toluene. D) Benzyl chloride. Show Answer Correct Answer: A) Biphenyl. 12. What is the trend of electronegativity in haloalkanes? A) I > Br > Cl > F. B) F > Cl > Br > I. C) Cl > F > Br > I. D) Br > I > Cl > F. Show Answer Correct Answer: B) F > Cl > Br > I. 13. Methyl ketone is identified by A) Haloform test. B) Iodoform test. C) Tollens reagent. D) None of the above. Show Answer Correct Answer: B) Iodoform test. 14. In the Wurtz reaction, the product obtained from two different alkyl halides is: A) A mixture of three alkanes. B) A single alkane. C) An alkene. D) An alcohol. Show Answer Correct Answer: A) A mixture of three alkanes. 15. Which of the following is a method for the preparation of aryl halides? A) Dehydrohalogenation. B) Hydrolysis. C) Electrophilic substitution. D) Free radical halogenation. Show Answer Correct Answer: C) Electrophilic substitution. 16. The order of reactivities of methyl halides in the formation of Grignard reagent is A) CH$_{3}$Cl>CH$_{3}$Br>CH$_{3}$I. B) CH$_{3}$Br>CH$_{3}$I>CH$_{3}$Cl. C) CH$_{3}$I>CH$_{3}$Br>CH$_{3}$Cl. D) CH$_{3}$Br>CH$_{3}$Cl>CH$_{3}$I. Show Answer Correct Answer: C) CH$_{3}$I>CH$_{3}$Br>CH$_{3}$Cl. 17. The main difference in C-X bond of a haloalkane and a haloarene is A) C-X bond in haloarenes acquires a double bond character due to higher electronegativity of X than haloalkanes. B) C-X bond in haloalkanes is shorter than haloarenes. C) In haloalkanes the C attached to halogen in C-X bond is sp$^{3}$ hybridised while in haloarenes it is sp$^{2}$ hybridised. D) Haloalkanes are less reactive than haloarenes due to difficulty in C-X cleavage in haloalkanes. Show Answer Correct Answer: C) In haloalkanes the C attached to halogen in C-X bond is sp$^{3}$ hybridised while in haloarenes it is sp$^{2}$ hybridised. 18. What is the role of haloalkanes in organic synthesis? A) Haloalkanes are only used in the production of pharmaceuticals. B) Haloalkanes are primarily used as solvents in organic reactions. C) Haloalkanes serve as catalysts in polymerization processes. D) Haloalkanes are key intermediates in organic synthesis, facilitating the formation of various functional groups through nucleophilic substitution and elimination reactions. Show Answer Correct Answer: D) Haloalkanes are key intermediates in organic synthesis, facilitating the formation of various functional groups through nucleophilic substitution and elimination reactions. 19. Which haloalkane is most soluble in water? A) Isopropyl chloride (C3H7Cl). B) Ethyl bromide (C2H5Br). C) Benzyl chloride (C6H5CH2Cl). D) Methyl chloride (CH3Cl). Show Answer Correct Answer: D) Methyl chloride (CH3Cl). 20. Ethyl bromide on treatment with silver cyanide give: A) Ethyl acetate. B) Ethyl iso cyanide. C) Ethyl cyanide. D) Ethyl amine. Show Answer Correct Answer: B) Ethyl iso cyanide. 21. How do you name a haloalkane with multiple halogen substituents? A) Name the compound based on the highest atomic number halogen only. B) List halogens in reverse alphabetical order. C) Use the IUPAC naming convention, listing halogens in alphabetical order with appropriate locants. D) Use Roman numerals for each halogen. Show Answer Correct Answer: C) Use the IUPAC naming convention, listing halogens in alphabetical order with appropriate locants. 22. The reactivity of halides in SN2 reaction is A) 3$^{o}$>2$^{o}$>1$^{o}$. B) 2$^{o}$>1$^{o}$>3$^{o}$. C) 1$^{o}$>3$^{o}$>2$^{o}$. D) 1$^{o}$>2$^{o}$>3$^{o}$. Show Answer Correct Answer: D) 1$^{o}$>2$^{o}$>3$^{o}$. 23. How do haloarenes differ from haloalkanes in terms of reactivity? A) Haloarenes react only with nucleophiles. B) Haloarenes are more reactive than haloalkanes. C) Haloalkanes are less stable than haloarenes. D) Haloarenes are less reactive than haloalkanes. Show Answer Correct Answer: D) Haloarenes are less reactive than haloalkanes. 24. The most reactive halogen in halogenations of alkanes under sunlight A) F. B) Cl. C) Br. D) I. Show Answer Correct Answer: B) Cl. 25. WHICH OF THEC FOLLOWING IS USED AS AN ANTISEPTIC? A) CHLOFORM. B) BROMFORM. C) IODOFORM. D) CARBON TETRA CHLORIDE. Show Answer Correct Answer: C) IODOFORM. ← PreviousNext →Related QuizzesClass 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 1Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 3Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 4Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 5Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 6Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 7Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 8Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 9Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 10Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books