This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following compounds on reaction with chloroform and alcoholic potash gives carbylamine A) Primary amine. B) Secondary amine. C) Tertiary amine. D) None of the above. Show Answer Correct Answer: A) Primary amine. 2. The order of reactivity of hydrogen halide s is A) HI>HBr>HCl. B) HCl>HBr>HI. C) All the above. D) None of the above. Show Answer Correct Answer: A) HI>HBr>HCl. 3. What is the major product formed when benzene undergoes electrophilic substitution with bromine? A) Iodobenzene. B) Chlorobenzene. C) Bromobenzene. D) Fluorobenzene. Show Answer Correct Answer: C) Bromobenzene. 4. Which of the following statements about haloarenes is correct? A) They are easily hydrolyzed in water. B) They undergo electrophilic substitution more easily than haloalkanes. C) They cannot undergo nucleophilic substitution reactions. D) They are more reactive than alkyl halides. Show Answer Correct Answer: C) They cannot undergo nucleophilic substitution reactions. 5. Which compound is used as antiseptic? A) Iodoform. B) CHI3. C) Ethanol. D) All of these. Show Answer Correct Answer: D) All of these. 6. Methyl bromide on reaction with sodium gives A) Ethane. B) Methane. C) Propane. D) None of the above. Show Answer Correct Answer: A) Ethane. 7. Why aryl halides are not much prone to nucleophilic substitution reaction? A) C-Cl bond length is more ( 177 pm ) in aryl halides. B) C-Cl bond is stable due to resonance. C) C-Cl bond acquires a partial double bond character due to resonance of pi electrons. D) C-Cl bond is more polarised. Show Answer Correct Answer: C) C-Cl bond acquires a partial double bond character due to resonance of pi electrons. 8. Describe the electrophilic substitution reaction of benzene with chlorine. A) Electrophilic addition reaction of benzene with chlorine. B) Electrophilic substitution reaction of benzene with chlorine involves the replacement of a hydrogen atom on the benzene ring by a chlorine atom. C) Radical substitution reaction of benzene with chlorine. D) Nucleophilic substitution reaction of benzene with chlorine. Show Answer Correct Answer: B) Electrophilic substitution reaction of benzene with chlorine involves the replacement of a hydrogen atom on the benzene ring by a chlorine atom. 9. Assertion:KCN React with methyl chloride to give methyl isocyanideReason:CN-is an ambident nucleophile A) (A) Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of the Assertion (A). B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A). C) Assertion (A) is true, but Reason (R) is false. D) Assertion (A) is false, but Reason (R) is true. Show Answer Correct Answer: D) Assertion (A) is false, but Reason (R) is true. 10. Assertion:KCN reacts with methyl chloride to give methyl isocyanide.Reason:CN-is an ambident nucleophile. A) Assertion and reason both are correct and reason is correct explanation of assertion. B) Assertion and reason both are wrong statements. C) Assertion is correct but reason is wrong statement. D) Assertion is wrong but reason is correct statement. E) Assertion and reason both are correct statements but reason is not correct explanation of assertion. Show Answer Correct Answer: D) Assertion is wrong but reason is correct statement. 11. Assertion:Haloarenes can undergo electrophilic substitution reactions. Reason:The presence of halogen atoms activates the aromatic ring towards electrophiles. A) Haloarenes cannot undergo electrophilic substitution reactions. B) True. C) The presence of halogen atoms deactivates the aromatic ring towards electrophiles. D) False. Show Answer Correct Answer: D) False. 12. What is the significance of the term 'persistent organic pollutants' (POPs) in relation to haloarenes? A) Haloarenes are significant as persistent organic pollutants (POPs) due to their stability, bioaccumulation, and toxicity. B) Haloarenes are biodegradable and non-toxic. C) Haloarenes are primarily found in natural water sources. D) Haloarenes are used as effective pesticides. Show Answer Correct Answer: A) Haloarenes are significant as persistent organic pollutants (POPs) due to their stability, bioaccumulation, and toxicity. 13. The IUPAC name of tertiary butyl chloride is A) 2-choloro-2-methyl propane. B) 3-chlorobutane. C) 4-cholorobutane. D) 1, 2-cholro-3-bromobutane. Show Answer Correct Answer: A) 2-choloro-2-methyl propane. 14. Which reagent is most preferable for preparation of haloalkanes? A) ZnCl2 + HCl. B) Thionyl chloride. C) Red PX$_{2}$( x$_{2}$ = br$_{2}$, Cl$_{2}$). D) NaBr + H$_{2}$SO$_{4}$. Show Answer Correct Answer: B) Thionyl chloride. 15. The compound C6H5F is an example of a ..... halide. A) Allylic. B) Benzylic. C) Aryl. D) Vinylic. Show Answer Correct Answer: C) Aryl. 16. What is the outcome of S N 2 reactions in terms of stereochemistry? A) No change. B) Inversion. C) Racemization. D) Retention. Show Answer Correct Answer: B) Inversion. 17. In the following sequence of reactions CH$_{3}$CH$_{2}$CH$_{2}$Br (alc) KOH $\rightarrow$(A) + HBr $\rightarrow$ (B) + (aq) KOH $\rightarrow$ (C). The product (C) is A) Propan-2-ol. B) Propan-1-ol. C) Propyne. D) Propene. Show Answer Correct Answer: A) Propan-2-ol. 18. The product formed when phenol reacts with chloroform and caustic soda is A) Salicylaldehyde. B) Benzoic acid. C) Salicylic acid. D) None of the above. Show Answer Correct Answer: A) Salicylaldehyde. 19. What type of reactions are haloalkanes susceptible to due to their polar nature? A) Addition reactions. B) Nucleophilic substitution and elimination reactions. C) Oxidation reactions. D) Polymerization reactions. Show Answer Correct Answer: B) Nucleophilic substitution and elimination reactions. 20. What factors influence the reactivity of haloarenes in electrophilic substitution reactions? A) The reactivity of haloarenes is influenced by the nature of the halogen, position of the halogen, resonance effects, steric hindrance, and substituent effects. B) Solubility of the haloarene in water. C) Temperature of the reaction. D) The color of the halogen. Show Answer Correct Answer: A) The reactivity of haloarenes is influenced by the nature of the halogen, position of the halogen, resonance effects, steric hindrance, and substituent effects. 21. Which reagent is commonly used to convert alkenes to haloalkanes? A) Alcohols. B) Carboxylic acids. C) Hydrogen halides (HX). D) Alkyl halides. Show Answer Correct Answer: C) Hydrogen halides (HX). 22. Which of the following is a characteristic reaction of haloalkanes:elimination, substitution, or both? A) Reduction. B) Condensation. C) Both. D) Addition. Show Answer Correct Answer: C) Both. 23. What is the role of a catalyst in electrophilic substitution reactions of haloarenes? A) A catalyst acts as a nucleophile in the reaction mechanism. B) A catalyst decreases the reactivity of haloarenes by stabilizing the substrate. C) A catalyst is not necessary for electrophilic substitution reactions of haloarenes. D) A catalyst increases the reactivity of haloarenes by generating a more electrophilic species for substitution. Show Answer Correct Answer: D) A catalyst increases the reactivity of haloarenes by generating a more electrophilic species for substitution. 24. On treating a mixture of two alkyl halides with sodium metal in dry ether, 2-methylpropane was obtained. The alkyl halides are A) Chloromethane and chloroethane. B) 2-chloropropane and chloromethane. C) Chloromethane and 1-chloropropane. D) 2-chloropropane and chloroethane. Show Answer Correct Answer: B) 2-chloropropane and chloromethane. 25. If a substrate undergoing S$_{2}$N reaction was of one stereoisomer, what would the product be like? A) .A racemic mixture. B) One stereoisomer. C) An unequal mixture of enantiomers. D) A non-chiral compound. Show Answer Correct Answer: B) One stereoisomer. ← PreviousNext →Related QuizzesClass 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 1Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 2Class 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 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books