This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which type of reaction leads to a mixture of enantiomers? A) Neither. B) S N 2 reactions. C) Both. D) S N 1 reactions. Show Answer Correct Answer: D) S N 1 reactions. 2. Which factor primarily influences the reactivity of haloalkanes in nucleophilic substitution reactions? A) The type of solvent used. B) The size of the halogen atom. C) The nature of the leaving group. D) The temperature of the reaction. Show Answer Correct Answer: C) The nature of the leaving group. 3. What is the primary environmental impact of using halogenated solvents? A) They have no significant environmental impact. B) They contribute to soil erosion. C) They are responsible for water contamination. D) They can lead to air pollution. Show Answer Correct Answer: C) They are responsible for water contamination. 4. What is the general reaction for the preparation of aryl halides? A) Nucleophilic aromatic substitution. B) Electrophilic aromatic substitution. C) Electrophilic aliphatic substitution. D) Free radical substitution. Show Answer Correct Answer: B) Electrophilic aromatic substitution. 5. What is the classification of haloalkanes based on the number of halogen atoms? A) Saturated and unsaturated. B) Mono, di, and tri. C) Primary, secondary, and tertiary. D) Alkyl, allylic, and aryl. Show Answer Correct Answer: B) Mono, di, and tri. 6. The order of reactivity of following alcohols with halogen acids is ..... (A) Propan-1-ol (B) Butane-2-ol (C) 2-Methyl butan-2-ol A) A B) A C) C D) B Show Answer Correct Answer: A) A 7. Why tertiary alcohols are prone to Sn1 mechanism? A) Tertiary alcohols is more stable. B) Due to low stability of tertiary carbocation. C) Tertiary alcohols is less stable. D) Due to high stability of tertiary carbocation. Show Answer Correct Answer: D) Due to high stability of tertiary carbocation. 8. Assertion:Electron withdrawing groups in aryl halides increases the reactivity towards nucleophilic substitution.Reason:2, 4-Dinitrochlorobenzene is more reactive than chlorobenzene. 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: B) Both assertion and reason are true but reason is not the correct explanation of the assertion. 9. Haloarenes are typically less reactive than haloalkanes due to: A) Electronegativity. B) Resonance stabilization. C) Steric hindrance. D) Molecular weight. Show Answer Correct Answer: B) Resonance stabilization. 10. Which among MeX, RCH$_{2}$X, R$_{2}$CHX and R$_{3}$CX is most reactive towards SN$^{2}$ reaction A) MeX. B) RCH$_{2}$X. C) R$_{2}$CHX. D) R$_{3}$CX. Show Answer Correct Answer: A) MeX. 11. What is the primary mechanism by which haloalkanes react with nucleophiles? A) Electrophilic addition. B) Electrophilic substitution. C) Nucleophilic substitution. D) Free radical substitution. Show Answer Correct Answer: C) Nucleophilic substitution. 12. What is the trend of bond strength in haloalkanes? A) C-I > C-Br > C-Cl > C-F. B) C-F > C-Cl > C-Br > C-I. C) C-Cl > C-F > C-Br > C-I. D) C-Br > C-I > C-F > C-Cl. Show Answer Correct Answer: B) C-F > C-Cl > C-Br > C-I. 13. In carbylamine reaction the main product is A) Isocyanide. B) Cyanide. C) Alcohol. D) None of the above. Show Answer Correct Answer: A) Isocyanide. 14. Alkaline hydrolysis of (CH$_{3}$)$_{3}$CBr involves two steps as follows.(CH$_{3}$)$_{3}$CBr $\rightarrow$ (CH$_{3}$)$_{3}$C$^{+}$ + Br$^{-}$ slow(CH$_{3}$)$_{3}$C$^{+ }$+ OH-$\rightarrow$ (CH$_{3}$)$_{3}$COH fastWhich of the following shows the rate equation for the reaction scheme? A) Rate = k[OH$^{-}$]. B) Rate = k[(CH$_{3}$)$_{3}$CBr]. C) Rate = k[(CH$_{3}$)$_{3}$CBr]$^{2}$. D) Rate = k[(CH$_{3}$)$_{3}$CBr][OH$^{-}$]. Show Answer Correct Answer: B) Rate = k[(CH$_{3}$)$_{3}$CBr]. 15. List two physical properties of haloalkanes that differ from alkanes. A) Higher boiling points and greater density. B) Similar boiling points and lower reactivity. C) Higher melting points and lower solubility. D) Lower boiling points and lower density. Show Answer Correct Answer: A) Higher boiling points and greater density. 16. Common name for methylbenzene ..... A) Toluene. B) Alkyl halides. C) All the above. D) None of the above. Show Answer Correct Answer: A) Toluene. 17. The correct order of reactivity towards SN$^{1}$ followings compounds (C6H5)3C-Cl, (C6H5)2CH-Br, CH2=CH-CH2-Cl, CH3CH2Cl A) (C6H5)3C-Cl <(C6H5)2CH-Cl B) (C6H5)3C-Cl< CH2=CH-CH2-Cl<(C6H5)2CH-Cl C) (C6H5)3C-Cl> CH2=CH-CH2-Cl>(C6H5)2CH-Cl>CH3CH2Cl. D) (C6H5)3C-Cl >(C6H5)2CH-Cl>CH2=CH-CH2-Cl>CH3CH2Cl. Show Answer Correct Answer: D) (C6H5)3C-Cl >(C6H5)2CH-Cl>CH2=CH-CH2-Cl>CH3CH2Cl. 18. Explain the mechanism of nucleophilic substitution in haloalkanes. A) Haloalkanes cannot undergo nucleophilic substitution reactions. B) SN1 and SN2 mechanisms are exclusive to alcohols. C) Nucleophilic substitution in haloalkanes can occur via SN1 or SN2 mechanisms. D) Nucleophilic substitution only occurs in aromatic compounds. Show Answer Correct Answer: C) Nucleophilic substitution in haloalkanes can occur via SN1 or SN2 mechanisms. 19. How do you differentiate between ortho, meta, and para substitutions in haloarenes? A) Ortho:1, 1; Meta:1, 2; Para:1, 3 positions. B) Ortho:1, 4; Meta:1, 2; Para:1, 3 positions. C) Ortho:1, 2; Meta:1, 3; Para:1, 4 positions. D) Ortho:1, 3; Meta:1, 2; Para:1, 5 positions. Show Answer Correct Answer: C) Ortho:1, 2; Meta:1, 3; Para:1, 4 positions. 20. Which is the correct increasing order of boiling points of the following compounds? 1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane A) Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane. B) 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane < Butane. C) Butane < 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane. D) Butane < 1-Chlorobutane < 1-Iodobutane < 1-Bromobutane. Show Answer Correct Answer: A) Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane. 21. Which hormone produced by the body contains iodine? A) Cortisol. B) Insulin. C) Thyroxine. D) Adrenaline. Show Answer Correct Answer: C) Thyroxine. 22. What type of substrates are involved in S N 2 reactions? A) Tertiary or secondary carbon atom. B) Primary carbon atom. C) Quaternary carbon atom. D) Aromatic carbon atom. Show Answer Correct Answer: B) Primary carbon atom. 23. Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces A) 1-phenylcyclopentene. B) 4-phenylcyclopentene. C) 3-phenylcyclopentene. D) 2-phenylcyclopentene. Show Answer Correct Answer: C) 3-phenylcyclopentene. 24. What can Grignard reagents be used as in the synthesis of complex molecules in the pharmaceutical and chemical industry? A) Building blocks. B) Inhibitors. C) Catalysts. D) Solvents. Show Answer Correct Answer: A) Building blocks. 25. What is the main product when chlorobenzene undergoes nucleophilic substitution with sodium hydroxide at high temperature? A) Phenol. B) Benzene. C) Chlorobenzene oxide. D) Aniline. Show Answer Correct Answer: A) Phenol. ← 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 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