This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which type of solvent favors S N 2 reactions? A) Non-polar solvents. B) Polar protic solvents. C) Ionic solvents. D) Polar aprotic solvents. Show Answer Correct Answer: D) Polar aprotic solvents. 2. How does the presence of halogens affect the solubility of organic compounds? A) Halogens only increase the solubility of organic compounds in non-polar solvents. B) Halogens decrease the solubility of organic compounds in polar solvents. C) Halogens have no effect on the solubility of organic compounds. D) Halogens generally increase the solubility of organic compounds in polar solvents. Show Answer Correct Answer: D) Halogens generally increase the solubility of organic compounds in polar solvents. 3. In which type of nucleophilic substitution reaction does the nucleophile attack the substrate molecule in a single step? A) S N 1 reactions. B) S N 2 reactions. C) Both. D) None. Show Answer Correct Answer: B) S N 2 reactions. 4. Tertiary alkyl halides are are practically inert to substitution by SN2 BECAUSE OF A) Insolubility. B) Instability. C) Inductive effect. D) Steric hindrance. Show Answer Correct Answer: D) Steric hindrance. 5. How are haloalkanes used in refrigeration? A) Haloalkanes are used as refrigerants in refrigeration systems. B) Haloalkanes are primarily used as fuels in engines. C) Haloalkanes are utilized in the production of plastics. D) Haloalkanes are used as solvents in paint. Show Answer Correct Answer: A) Haloalkanes are used as refrigerants in refrigeration systems. 6. What is the main use of chloroform (CHCl3)? A) Food preservative in packaging. B) Pesticide for agricultural use. C) Solvent and chemical production. D) Refrigerant in air conditioning systems. Show Answer Correct Answer: C) Solvent and chemical production. 7. Which haloalkane is most likely to undergo elimination reactions? A) Vinyl haloalkane. B) Secondary haloalkane. C) Tertiary haloalkane. D) Primary haloalkane. Show Answer Correct Answer: C) Tertiary haloalkane. 8. What is the IUPAC name for CH3CH2CH2CH2CH2Br? A) Methyl bromide. B) Pentyl bromide. C) Butyl bromide. D) Hexyl bromide. Show Answer Correct Answer: B) Pentyl bromide. 9. What are haloalkanes and how are they classified? A) Haloalkanes are inorganic compounds with no carbon structure. B) Haloalkanes are formed by adding hydrogen to alkenes. C) Haloalkanes are classified only by their boiling points. D) Haloalkanes are organic compounds formed by replacing hydrogen in alkanes with halogens, classified as primary, secondary, or tertiary based on the carbon structure. Show Answer Correct Answer: D) Haloalkanes are organic compounds formed by replacing hydrogen in alkanes with halogens, classified as primary, secondary, or tertiary based on the carbon structure. 10. Which of the following statements is not correct about S$_{N}$2 reaction of alkyl halides? A) The rate of reaction depends upon the concentration of nucleophile. B) The bond formation and bond breaking take place in one step. C) S$_{N}$2 mechanism is predominant in tertiary alkyl halides. D) Nucleophile attacks the carbon from the side opposite to where the leaving group is attached. Show Answer Correct Answer: C) S$_{N}$2 mechanism is predominant in tertiary alkyl halides. 11. Which alkyl halide exhibits complete racemization in S$_{N}$1 reaction? A) C$_{6}$H$_{5}$CH$_{2}$Cl. B) (CH$_{3}$)$_{2}$CHCl. C) CH$_{3}$CH$_{2}$Cl. D) CH$_{3}$CH$_{2}$CH$_{2}$Cl. Show Answer Correct Answer: A) C$_{6}$H$_{5}$CH$_{2}$Cl. 12. Mechanism of hydrolysis of 2-chloro-2-methylpropane to 2-methyl-2-propanol A) S$_{N}$1. B) S$_{N}$2. C) All the above. D) None of the above. Show Answer Correct Answer: A) S$_{N}$1. 13. Which of the following alkyl halide is most readily undergoes hydrolysis by SN$^{1}$ mechanism? A) CH$_{3}$CH$_{2}$CH$_{2}$Cl. B) CH$_{3}$Cl. C) (CH$_{3}$)$_{2}$ CHCl. D) (CH$_{3}$)$_{3}$ CCl. Show Answer Correct Answer: D) (CH$_{3}$)$_{3}$ CCl. 14. Halogen compounds have ..... boiling point than the parent hydrocarbons A) Higher. B) Lower. C) Same. D) Unpredictable. Show Answer Correct Answer: A) Higher. 15. What is the difference between primary, secondary, and tertiary haloalkanes? A) Secondary haloalkanes have three carbons attached to the halogen. B) Primary haloalkanes have two carbons attached to the halogen. C) Tertiary haloalkanes have one carbon attached to the halogen. D) Primary haloalkanes have one carbon attached to the halogen, secondary have two, and tertiary have three. Show Answer Correct Answer: D) Primary haloalkanes have one carbon attached to the halogen, secondary have two, and tertiary have three. 16. What is the effect of halogenation on the reactivity of alkenes? A) Halogenation increases the reactivity of alkenes by forming more stable intermediates. B) Halogenation only affects the physical properties of alkenes. C) Halogenation has no effect on the reactivity of alkenes. D) Halogenation decreases the reactivity of alkenes. Show Answer Correct Answer: A) Halogenation increases the reactivity of alkenes by forming more stable intermediates. 17. Cyclobutyl bromide on treatment with Mg in dry ether forms an organometallic compound (A). the organometallic compound reacts with ethanal to give an alcohol(B) after mild acidification. Prolonged treatment of OH (B) with an equivalent amount of HBr gives (C). What will be the product 'C? A) 1-chloro-1-ethylcyclopentane. B) 1-bromo-1-methylcyclopentane. C) 3-bromo-2-methylcyclopentane. D) None of these. Show Answer Correct Answer: B) 1-bromo-1-methylcyclopentane. 18. What is the effect of the halogen atom on the boiling point of haloalkanes? A) The boiling point of haloalkanes is unaffected by the size of the halogen atom. B) The boiling point of haloalkanes decreases with the size of the halogen atom. C) The boiling point of haloalkanes increases with the size of the carbon chain. D) The boiling point of haloalkanes increases with the size of the halogen atom. Show Answer Correct Answer: D) The boiling point of haloalkanes increases with the size of the halogen atom. 19. A is a secondary haloalkane with formula C$_{5}$H$_{11}$Br and optically active. Identify A. A) CH$_{3}$CH$_{2}$CH$_{2}$CH$_{2}$CH$_{2}$Br. B) CH$_{3}$CH(Br)CH$_{2}$CH$_{2}$CH$_{3}$. C) (CH$_{3}$)$_{2}$C(Br)CH$_{2}$CH$_{3}$. D) (CH$_{3}$)$_{2}$C(Br)C(CH$_{3}$)$_{2}$CH$_{2}$CH$_{3}$. Show Answer Correct Answer: B) CH$_{3}$CH(Br)CH$_{2}$CH$_{2}$CH$_{3}$. 20. Assertion:The presence of multiple halogen atoms in haloalkanes increases their reactivity. Reason:More halogens lead to a greater electrophilic character of the carbon atom. A) The assertion is false, but the reason is true. B) Both the assertion and reason are false, and the reason does not explain the assertion. C) Both the assertion and reason are true, and the reason correctly explains the assertion. D) The assertion is true, but the reason is false. Show Answer Correct Answer: C) Both the assertion and reason are true, and the reason correctly explains the assertion. 21. What is the significance of the leaving group in haloalkane reactions? A) The leaving group only influences the product stability. B) The leaving group significantly impacts the reaction rate and mechanism in haloalkane reactions. C) The leaving group determines the color of the reaction mixture. D) The leaving group has no effect on the reaction rate. Show Answer Correct Answer: B) The leaving group significantly impacts the reaction rate and mechanism in haloalkane reactions. 22. What are some common applications of haloalkanes and haloarenes in industry? A) Common applications include solvents, chemical intermediates, pharmaceuticals, agrochemicals, refrigerants, and flame retardants. B) Textile dyes. C) Construction materials. D) Food preservatives. Show Answer Correct Answer: A) Common applications include solvents, chemical intermediates, pharmaceuticals, agrochemicals, refrigerants, and flame retardants. 23. Which of the following is the most reactive towards nucleophilic substitution reaction? A) CH$_{3}$CH=CH-Cl. B) CH$_{2}$=CH-Cl. C) ClCH$_{2}$-CH=CH$_{2}$. D) C$_{6}$H$_{5}$Cl. Show Answer Correct Answer: C) ClCH$_{2}$-CH=CH$_{2}$. 24. Complete the following reaction R-OH + X $\rightarrow$ A) SO2. B) SOCl3. C) SOCl2. D) SOCl. Show Answer Correct Answer: C) SOCl2. 25. Which reagent is commonly used to convert arenes to haloarenes? A) Sulfuric acid (H2SO4) alone. B) Chlorine (Cl2) with no catalyst. C) Iodine (I2) in aqueous solution. D) Bromine (Br2) with a catalyst. Show Answer Correct Answer: D) Bromine (Br2) with a 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 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 10Class 12 Chemistry (Part Ii) Chapter 10 Haloalkanes And Haloarenes Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books