This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the significance of the C-X bond in haloalkanes? A) The C-X bond is only important for color changes in haloalkanes. B) The C-X bond is irrelevant in determining the boiling point of haloalkanes. C) The C-X bond in haloalkanes is significant for determining reactivity and properties due to its polarity and bond strength. D) The C-X bond has no effect on the solubility of haloalkanes in water. Show Answer Correct Answer: C) The C-X bond in haloalkanes is significant for determining reactivity and properties due to its polarity and bond strength. 2. What is the main product when a haloalkane reacts with a strong base? A) Alcohol. B) Alkane. C) Carboxylic acid. D) Alkene. Show Answer Correct Answer: D) Alkene. 3. Which of the following haloalkanes is most reactive? A) 1-chloropropane. B) 2-chloropropane. C) 2-bromopropane. D) 1-bromopropane. Show Answer Correct Answer: C) 2-bromopropane. 4. What is the IUPAC name for CH3CH2Cl? A) Ethyl chloride. B) Chloroethanol. C) 1-chloropropane. D) 1-chloroethane. Show Answer Correct Answer: D) 1-chloroethane. 5. What is the primary reaction type for haloalkanes with strong nucleophiles? A) E1 reaction. B) SN1 reaction. C) SN2 reaction. D) Elimination reaction. Show Answer Correct Answer: C) SN2 reaction. 6. SN1 reaction of alkyl halides lead to A) Retention of configuration. B) Racemisation. C) Inversion of configuration. D) None of these. Show Answer Correct Answer: A) Retention of configuration. 7. Assertion:Halogen acids react with alcohols to form haloalkanes.Reason:Order of reactivity of halogen acids HCl>HBr>HI A) Both assertion and reason are true and the reason is the correct explanation of the assertion. B) Both assertion and reason are true but reason is not the correct explanation of the assertion. C) Assertion is true but reason is false. D) Assertion is false but reason is true. Show Answer Correct Answer: C) Assertion is true but reason is false. 8. Chloroform react with oxygen to form A) Phosgene. B) COCl2. C) Poisonous gas that can damage liver and kidney. D) All of these. Show Answer Correct Answer: D) All of these. 9. Ethyl alcohol is obtained when ethyl chloride is boiled with A) Alcoholic KOH. B) Aqueous KOH. C) Water. D) Aqueous KMnO4. Show Answer Correct Answer: B) Aqueous KOH. 10. What is the mechanism of nucleophilic substitution in haloalkanes? A) Nucleophilic substitution in haloalkanes occurs via SN1 and SN2 mechanisms. B) Nucleophilic substitution is exclusively an acid-base reaction. C) Haloalkanes undergo substitution via radical mechanisms. D) Nucleophilic substitution occurs only through the elimination mechanism. Show Answer Correct Answer: A) Nucleophilic substitution in haloalkanes occurs via SN1 and SN2 mechanisms. 11. Which type of solvent is preferred for S N 1 reactions? A) Polar protic solvents. B) Non-polar solvents. C) Polar aprotic solvents. D) Ionic solvents. Show Answer Correct Answer: A) Polar protic solvents. 12. S$_{N}$2 is a ..... step mechanism A) One. B) Two. C) All the above. D) None of the above. Show Answer Correct Answer: A) One. 13. Reactivity towards Nu-subs.:haloarenes vs haloalkanes A) Delocalisation reduce partial +ve charge on halogen-carrying C atom making it less susceptible to attack by Nu-. B) Delocalisation increase partial +ve charge on halogen-carrying C atom making it less susceptible to attack by Nu-. C) All the above. D) None of the above. Show Answer Correct Answer: A) Delocalisation reduce partial +ve charge on halogen-carrying C atom making it less susceptible to attack by Nu-. 14. Complete the following reaction R-X + KNO2 $\rightarrow$ A + KXA is A) RNO2. B) RONO. C) RNO. D) RNO3. Show Answer Correct Answer: B) RONO. 15. Name the two main types of nucleophilic substitution reactions. A) SNi and SNe. B) SN1 and SNi. C) SN3 and SN4. D) SN1 and SN2. Show Answer Correct Answer: D) SN1 and SN2. 16. Most strong C-X bond (important for rate substitution). betweenC-FC-ClC-BrC-I A) C-F. B) C-Cl. C) C-Br. D) C-I. Show Answer Correct Answer: A) C-F. 17. Reactivity of haloalkanes towards S$_{N}$2 mechanism A) 3$^\circ$ > 2$^\circ$ > 1$^\circ$. B) 3$^\circ$ < 2$^\circ$ < 1$^\circ$. C) All the above. D) None of the above. Show Answer Correct Answer: A) 3$^\circ$ > 2$^\circ$ > 1$^\circ$. 18. What is nucleophilic substitution? A) A process that involves the addition of a leaving group to a nucleophile. B) A reaction that only occurs in the presence of a catalyst. C) A reaction where two nucleophiles combine to form a larger molecule. D) A chemical reaction where a nucleophile replaces a leaving group in a molecule. Show Answer Correct Answer: D) A chemical reaction where a nucleophile replaces a leaving group in a molecule. 19. 2-Chloro-2-methylpropane on reaction with alc.KOH gives X as the product. X is A) 2-methyobutan-2-ol. B) But-2-ene. C) 2-methylbut-1-ene. D) 2-methylprop-1-ene. Show Answer Correct Answer: D) 2-methylprop-1-ene. 20. How do you determine the stability of carbocations formed during nucleophilic substitution? A) The stability is solely based on the molecular weight of the carbocation. B) Carbocation stability is determined by the temperature of the reaction. C) The presence of halogens increases carbocation stability. D) The stability of carbocations is determined by hybridization, substituent effects, resonance, and steric factors. Show Answer Correct Answer: D) The stability of carbocations is determined by hybridization, substituent effects, resonance, and steric factors. 21. Arrange the following alkyl halides in order of dehydrohalogenation C$_{2}$H$_{5}$I, C$_{2}$H$_{2}$Cl, C$_{2}$H$_{5}$Br, C$_{2}$H$_{5}$F A) C$_{2}$H$_{5}$I> C$_{2}$H$_{2}$Cl> C$_{2}$H$_{5}$Br> C$_{2}$H$_{5}$F. B) C$_{2}$H$_{5}$F> C$_{2}$H$_{2}$I> C$_{2}$H$_{5}$Br> C$_{2}$H$_{5}$Cl. C) C$_{2}$H$_{5}$F> C$_{2}$H$_{2}$Cl> C$_{2}$H$_{5}$Br> C$_{2}$H$_{5}$I. D) C$_{2}$H$_{5}$I> C$_{2}$H$_{2}$Br> C$_{2}$H$_{5}$Cl> C$_{2}$H$_{5}$F. Show Answer Correct Answer: D) C$_{2}$H$_{5}$I> C$_{2}$H$_{2}$Br> C$_{2}$H$_{5}$Cl> C$_{2}$H$_{5}$F. 22. Name a common reaction that haloarenes undergo instead of nucleophilic substitution. A) Electrophilic aromatic substitution. B) Nucleophilic addition. C) Radical substitution. D) Dehydrohalogenation. Show Answer Correct Answer: A) Electrophilic aromatic substitution. 23. What is the primary use of chloramphenicol? A) Treatment of malaria. B) Treatment of typhoid fever. C) As a solvent. D) As an anesthetic. Show Answer Correct Answer: B) Treatment of typhoid fever. 24. In SN$^{1}$ the order of reactivity of halide is: A) 3$^{0}$ > 2$^{0}$ > 1$^{0}$ > methyl. B) Methyl > 1$^{0}$>2$^{0}$ > 3$^{0}$. C) 3$^{0}$ > 2$^{0}$ > methyl > 1$^{0}$. D) 2$^{0}$ > 1$^{0}$ > methyl > 3$^{0}$. Show Answer Correct Answer: A) 3$^{0}$ > 2$^{0}$ > 1$^{0}$ > methyl. 25. How can alkyl halides be prepared from alcohols? A) Addition reaction with a hydrogen halide in the presence of a Lewis acid catalyst. B) Oxidation reaction with a halogen gas. C) Substitution reaction with a hydrogen halide in the presence of a Lewis acid catalyst. D) Direct combination of alcohol and halogen gas. Show Answer Correct Answer: C) Substitution reaction with a hydrogen halide in the presence of a Lewis acid catalyst. ← 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 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