This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What can Grignard reagents be used to synthesize by reacting with carbonyl compounds such as aldehydes and ketones? A) Carboxylic acids. B) Alkenes. C) Alkanes. D) Alcohols. Show Answer Correct Answer: D) Alcohols. 2. Among the following, the suitable reagent for Wurtz-Fittigreaction is A) Na/alcohol. B) Na/ether. C) Zn/ether. D) Zn/alcohol. Show Answer Correct Answer: B) Na/ether. 3. Which of the following molecules has higher dipole moment? A) CH$_{2}$Cl$_{2}$. B) CCl$_{4}$. C) CH$_{3}$Cl. D) CHCl$_{3}$. Show Answer Correct Answer: C) CH$_{3}$Cl. 4. Tertiary alkyl halides are practically inert to substitution by 2 mechanism because A) There is inductive effect. B) There is steric hindrance. C) The rate of reaction is faster in S$_{N}$2 mechanism. D) The carbocation formed is unstable. Show Answer Correct Answer: B) There is steric hindrance. 5. The order of reactivity of haloalkanes in nucleophilic substitution reactions is: A) RI > RBr > RCl > RF. B) RCl > RBr > RI > RF. C) RF > RCl > RBr > RI. D) RBr > RI > RCl > RF. Show Answer Correct Answer: A) RI > RBr > RCl > RF. 6. How does the presence of a halogen affect the reactivity of an aromatic compound? A) Halogens increase the reactivity of aromatic compounds due to their electron-donating effects. B) Halogens have no effect on the reactivity of aromatic compounds. C) Halogens make aromatic compounds more stable and less reactive. D) Halogens decrease the reactivity of aromatic compounds due to their electron-withdrawing effects. Show Answer Correct Answer: D) Halogens decrease the reactivity of aromatic compounds due to their electron-withdrawing effects. 7. Ethyl alcohol is obtained with ethyl chloride is boiled with A) Aqueous KOH. B) Water. C) Aqueous KMnO$_{4}$. D) Alcoholic KOH. Show Answer Correct Answer: A) Aqueous KOH. 8. What is the primary mechanism of nucleophilic substitution in haloalkanes? A) SN1 mechanism. B) Electrophilic addition. C) SN2 mechanism. D) E1 mechanism. Show Answer Correct Answer: C) SN2 mechanism. 9. Describe the mechanism of nucleophilic substitution in haloalkanes. A) Nucleophilic substitution involves the addition of a halogen to the molecule. B) Nucleophilic substitution in haloalkanes can occur via SN1 or SN2 mechanisms, involving the replacement of a halogen by a nucleophile. C) SN1 and SN2 mechanisms are only applicable to alkenes. D) Nucleophiles are always negatively charged species in haloalkanes. Show Answer Correct Answer: B) Nucleophilic substitution in haloalkanes can occur via SN1 or SN2 mechanisms, involving the replacement of a halogen by a nucleophile. 10. A mixture of 1-chloropropane and 2-chloropropane when treated with alcoholic KOH gives A) A mixture of prop-1-ene and prop-2-ene. B) Prop-1-ene. C) Propanol. D) Prop-2-ene. Show Answer Correct Answer: B) Prop-1-ene. 11. Among dihaloarenes, the melting point is highest for A) O-Isomer. B) P-Isomer. C) M-Isomer. D) Same for all. Show Answer Correct Answer: B) P-Isomer. 12. Write the order of increasing S$_{1}$N reactivity for the following alkyl halides:A) CH3-XB) (CH3)2CH-XC) (CH3)3C-XD) (CH3)3C-CH2-X A) A>C>B>D. B) C>A>B>D. C) C>B>D>A. D) D>C>B>A. Show Answer Correct Answer: C) C>B>D>A. 13. What is the main characteristic of the carbon-halogen bond in alkyl halides? A) It is non-polar. B) It is highly stable. C) It is polarized. D) It is ionic. Show Answer Correct Answer: C) It is polarized. 14. How many chiral compounds are possible on monochlorination of 2-methyl butane? A) 2. B) 4. C) 6. D) 8. Show Answer Correct Answer: A) 2. 15. What is the IUPAC name for CH3CH2CH2CH2CH2CH2CH2CH2Cl? A) 1-chlorohexane. B) 2-chlorooctane. C) 3-chloropentane. D) 1-chlorooctane. Show Answer Correct Answer: D) 1-chlorooctane. 16. List two common uses of haloalkanes in industry. A) Refrigerants in cooling systems. B) Solvents and intermediates in pharmaceuticals/agrochemicals. C) Food preservatives in packaging. D) Fuel additives in automotive. Show Answer Correct Answer: B) Solvents and intermediates in pharmaceuticals/agrochemicals. 17. Which of the following is an example of vic-dihalide? A) 1, 2-Dichloroethane. B) Dichloromethane. C) Ethylidene chloride. D) Allyl chloride. Show Answer Correct Answer: A) 1, 2-Dichloroethane. 18. The IUPAC name of (CH$_{3}$)$_{2}$CH-CH$_{2}$-CH$_{2}$Br is A) 1-bromopentane. B) 2-methyl-4-bromobutane. C) 1-bromo-3-methylbutane. D) 2-methyl-3-bromopropane. Show Answer Correct Answer: C) 1-bromo-3-methylbutane. 19. Explain the role of haloarenes in electrophilic substitution reactions. A) Haloarenes exclusively direct electrophiles to the meta position. B) Haloarenes only participate in nucleophilic substitution reactions. C) Haloarenes do not affect the stability of carbocation intermediates. D) Haloarenes play a role in electrophilic substitution reactions by directing electrophiles to ortho/para positions and stabilizing the carbocation intermediate. Show Answer Correct Answer: D) Haloarenes play a role in electrophilic substitution reactions by directing electrophiles to ortho/para positions and stabilizing the carbocation intermediate. 20. Describe the physical properties of haloarenes. A) Haloarenes have lower boiling points than hydrocarbons. B) Haloarenes are colorless liquids or solids, have higher boiling points than hydrocarbons, and are less soluble in water. C) Haloarenes are highly soluble in water. D) Haloarenes are brightly colored gases. Show Answer Correct Answer: B) Haloarenes are colorless liquids or solids, have higher boiling points than hydrocarbons, and are less soluble in water. 21. 10g mixture of iso-butane & iso-butene requires 20g of Br$_{2}$ (in CCl$_{4}$) for complete addition. If 10g of the mixture is catalytically hydrogenated & the entire alkane is monobrominated in the presence of light at 127, how much of it would be formed?(atomic weight of Br=80) A) 24.21g. B) 20.0g. C) 30.0g. D) 12g. Show Answer Correct Answer: A) 24.21g. 22. What should be the correct IUPAC name for diethylbromomethane? A) 1-bromo-1, 1-diethylmethane. B) 3-bromopentane. C) 1-bromo-1-ethylpropane. D) 1-bromopentane. Show Answer Correct Answer: B) 3-bromopentane. 23. What can Grignard reagents be used to synthesize by reacting with silicon halides? A) Organosilicon compounds. B) Amines. C) Alcohols. D) Ethers. Show Answer Correct Answer: A) Organosilicon compounds. 24. Name the following compound:C6H5Cl A) Chloridebenzene. B) Chlorobenzene. C) Chlorophenyl. D) Benzenechloride. Show Answer Correct Answer: B) Chlorobenzene. 25. Which of the following alkyl halides will undergo SN1 reaction most readily? A) (CH3)3 C-F. B) (CH3)3 C-Cl. C) (CH3)3 C-Br. D) (CH3)3 C-I. Show Answer Correct Answer: D) (CH3)3 C-I. ← 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