This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The gas formed when iodoform reacts with silver powder A) Acetylene. B) Ethene. C) Propene. D) None of the above. Show Answer Correct Answer: A) Acetylene. 2. Which is the correct IUPAC name for CH3-CH(C2H5)-CH2-Br? A) 1-Bromo-2-ethylpropane. B) 1-Bromo-2-ethyl-2-methylethane. C) 1-Bromo-2-methylbutane. D) 2-Methyl-1-bromobutane. Show Answer Correct Answer: C) 1-Bromo-2-methylbutane. 3. Which reagent is commonly used in electrophilic aromatic substitution reactions? A) Reducing agents like lithium aluminum hydride (LiAlH4). B) Electrophiles such as bromine (Br2) with a Lewis acid catalyst. C) Oxidizing agents such as potassium permanganate (KMnO4). D) Nucleophiles like sodium hydroxide (NaOH). Show Answer Correct Answer: B) Electrophiles such as bromine (Br2) with a Lewis acid catalyst. 4. What type of hybridization is present in the carbon atom bonded to the halogen in haloarenes? A) Sp. B) Sp2. C) Sp3. D) Sp3d. Show Answer Correct Answer: B) Sp2. 5. The halogenation of alkanes gives alkyl halide which are A) Positional isomers. B) Chain isomers. C) Functional isomers. D) Metamers. Show Answer Correct Answer: A) Positional isomers. 6. What is the general formula for haloalkanes? A) CnH2n+1X. B) CnH2nX. C) CnH2n+2X. D) CnH2n-1X. Show Answer Correct Answer: A) CnH2n+1X. 7. What is the purpose of using a Lewis acid catalyst in electrophilic substitution reactions? A) To neutralize the electrophile before it reacts with the aromatic ring. B) To decrease the reactivity of the electrophile towards the aromatic ring. C) To increase the reactivity of the electrophile towards the aromatic ring. D) To inhibit the reaction between the electrophile and the aromatic ring. Show Answer Correct Answer: C) To increase the reactivity of the electrophile towards the aromatic ring. 8. Which type of reaction is favored for tertiary haloalkanes when treated with a strong nucleophile? A) Elimination reaction. B) All of the above. C) SN2 reaction. D) SN1 reaction. Show Answer Correct Answer: D) SN1 reaction. 9. Assertion:Haloalkanes can be converted to alkenes through elimination reactions. Reason:This process involves the removal of a halogen and a hydrogen atom. A) Elimination reactions do not involve any atoms being removed. B) This process adds a halogen and a hydrogen atom. C) Haloalkanes cannot be converted to alkenes. D) True. Show Answer Correct Answer: D) True. 10. What is the order of reactivity of alkyl halides in S ..... N1 reactions? A) Tertiary > Secondary > Primary. B) Primary > Secondary > Tertiary. C) Secondary > Tertiary > Primary. D) All are equally reactive. Show Answer Correct Answer: A) Tertiary > Secondary > Primary. 11. Which of the following is most reactive towards SN1 reaction? A) C$_{6}$H$_{5}$C(CH$_{3}$)C$_{6}$H$_{5}$Br. B) C$_{6}$H$_{5}$CH$_{2}$Br. C) C$_{6}$H$_{5}$CH(C$_{6}$H$_{5}$)Br. D) C$_{6}$H$_{5}$CH(CH$_{3}$)Br. Show Answer Correct Answer: A) C$_{6}$H$_{5}$C(CH$_{3}$)C$_{6}$H$_{5}$Br. 12. What is formed when hydrogen atoms in hydrocarbons are replaced by halogen atoms? A) Amines and amides. B) Alcohols and ethers. C) Alkyl halides and aryl halides. D) Alkenes and alkynes. Show Answer Correct Answer: C) Alkyl halides and aryl halides. 13. Assertion:The reaction of haloalkanes with sodium hydroxide leads to the formation of alcohols. Reason:This reaction is an example of nucleophilic substitution. A) The assertion is false, but the reason is true. B) Both assertion and reason are true, and the reason correctly explains the assertion. C) Both assertion and reason are false, and the reason does not explain the assertion. D) The assertion is true, but the reason is false. Show Answer Correct Answer: B) Both assertion and reason are true, and the reason correctly explains the assertion. 14. . Which is the correct increasing order of boiling points of the following compounds? A) Bromobenzene < 1-Bromobutane < 1-Bromopropane < 1-Bromoethane. B) Bromobenzene < 1-Bromoethane < 1-Bromopropane < 1-Bromobutane. C) 1-Bromopropane < 1-Bromobutane < 1-Bromoethane < Bromobenzene. D) 1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene. Show Answer Correct Answer: D) 1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene. 15. Which one of the following is not correct order of boiling point of the alkyl/aryl halides? A) CH$_{3}$(CH$_{2}$)CH$_{3}$Cl > CH$_{3}$(CH$_{2}$)$_{2}$Cl. B) CH$_{3}$(CH$_{2}$)$_{3}$Cl>CH$_{3}$CH$_{2}$CHClCH$_{3}$. C) CHCl$_{3}$> CH$_{2}$Cl$_{2}$. D) (CH$_{3}$)$_{3}$CCl>(CH$_{3}$)$_{2}$CHCH$_{2}$Cl. Show Answer Correct Answer: D) (CH$_{3}$)$_{3}$CCl>(CH$_{3}$)$_{2}$CHCH$_{2}$Cl. 16. The most reactive alkyl halide is: A) R-Cl. B) R-Br. C) R-I. D) R-F. Show Answer Correct Answer: C) R-I. 17. Which of the following statements regarding the S$_{N}$1 reaction shown by alkyl halide is not correct? A) The S$_{N}$1 reaction involves the inversion of configuration of the optically active subtract. B) The S$_{N}$1 reaction on the chiral starting material ends up with racemization of the product. C) The more stable the carbocation intermediate the faster the S$_{N}$1 reaction. D) The added nucleophile plays no kinetic role in S$_{N}$1 reaction. Show Answer Correct Answer: A) The S$_{N}$1 reaction involves the inversion of configuration of the optically active subtract. 18. S$_{N}$2 stand for A) Bimolecular nucleophilic substitution. B) Unimolecular nucleophilic substitution. C) All the above. D) None of the above. Show Answer Correct Answer: A) Bimolecular nucleophilic substitution. 19. Which of the following reactions does not proceed through a carbocation intermediate? A) SN1. B) Elimination (E1). C) SN2. D) Rearrangement reaction. Show Answer Correct Answer: C) SN2. 20. If Tollen's reagent is added to a compound and it forms a silver mirror, what functional group is present? A) Ketone. B) Aldehyde. C) Carboxylic acid. D) Alcohol. Show Answer Correct Answer: B) Aldehyde. 21. What are the physical properties of haloarenes compared to alkanes? A) Haloarenes have higher boiling/melting points, lower volatility, and higher density compared to alkanes. B) Haloarenes are more volatile than alkanes. C) Haloarenes have lower density compared to alkanes. D) Haloarenes have lower boiling/melting points than alkanes. Show Answer Correct Answer: A) Haloarenes have higher boiling/melting points, lower volatility, and higher density compared to alkanes. 22. Haloform reaction does not take place in A) Propan-2-one. B) Propan2-ol. C) Ethanol. D) 2-chlorobutane. Show Answer Correct Answer: D) 2-chlorobutane. 23. The IUPAC name of CH$_{3 }$CH$_{2}$ CH$_{2}$ CH$_{2}$ Br is A) Bromobutane. B) Bromopropane. C) Bromoethane. D) Bromopentane. Show Answer Correct Answer: A) Bromobutane. 24. Which type of reactions are haloalkanes more reactive towards? A) SN1/SN2. B) E1/E2. C) Addition. D) Polymerization. Show Answer Correct Answer: A) SN1/SN2. 25. Which of the following compounds is considered a potential blood substitute? A) Chloroquine. B) Thyroxine. C) Fluorinated compounds. D) Chloramphenicol. Show Answer Correct Answer: C) Fluorinated compounds. ← 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 10Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books