This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 29 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Organic compounds must have which two elements? A) Carbon and Oxygen. B) Oxygen and hydrogen. C) Carbon and Hydrogen. D) None of the above. Show Answer Correct Answer: C) Carbon and Hydrogen. 2. Which one of the following mechanisms is not involved in the reaction sequence below?CH$_{3}$CH$_{3}$ $\rightarrow$ CH$_{3}$CH$_{2}$Cl $\rightarrow$ CH$_{3}$CH$_{2}$OH $\rightarrow$ CH$_{2}$=CH$_{2}$ $\rightarrow$ CH$_{3}$CH$_{2}$Br A) Electrophilic addition. B) Electrophilic substitution. C) Nucleophilic substitution. D) Free-radical substitution. Show Answer Correct Answer: B) Electrophilic substitution. 3. Which pair of compounds can be distinguished by reacting them with dilute bromine water in the dark? A) CH$_{3}$CH$_{2}$COOH and CH$_{3}$CH$_{2}$CHO. B) CH$_{3}$CH$_{2}$CHCHCH$_{3}$ and CH$_{3}$CH$_{2}$CH$_{2}$CH$_{2}$CH$_{3}$. C) CH$_{3}$CH$_{2}$CH(CH$_{3}$)$_{2}$ and CH$_{3}$CH$_{2}$CH$_{2}$CH$_{2}$CH$_{3}$. D) CH$_{3}$CH$_{2}$CH$_{2}$CHBrCH$_{3}$ and CH$_{3}$CH$_{2}$CHBrCH$_{2}$CH$_{3 }$. Show Answer Correct Answer: B) CH$_{3}$CH$_{2}$CHCHCH$_{3}$ and CH$_{3}$CH$_{2}$CH$_{2}$CH$_{2}$CH$_{3}$. 4. Which functional group contains a halogen atom? A) Haloform. B) Halogenate. C) Halide. D) Halogenize. Show Answer Correct Answer: C) Halide. 5. All homologous series varies by a group of A) CH. B) CH$_{2}$. C) CH$_{3}$. D) CH$_{4}$. Show Answer Correct Answer: B) CH$_{2}$. 6. Polymers are made up of ..... A) Monomers. B) Dimers. C) Amino Acids. D) Unimers. Show Answer Correct Answer: A) Monomers. 7. Ethene, propene and butene are all members of the same homologous series.Which statement explains why ethene, propene and butene have similar chemical properties? A) They all have the same functional group. B) They are all gases at room temperature. C) They are all hydrocarbons. D) They are all organic. Show Answer Correct Answer: A) They all have the same functional group. 8. Applying IUPAC rules, what is the name of CH$_{3}$CH(CH$_{3}$)CH$_{2}$COOH? A) 2, 3-dimethylpropanoic acid. B) Pentanoic acid. C) 3-methylbutanoic acid. D) 2-methylbutanoic acid. Show Answer Correct Answer: C) 3-methylbutanoic acid. 9. Which type of polymerisation uses two different monomers, both contain a functional group at each end? A) Addition polymerisation. B) Condensation polymerisation. C) All the above. D) None of the above. Show Answer Correct Answer: B) Condensation polymerisation. 10. Main product from the following reaction is ..... A) CH$_{3}$-CH(CH$_{3}$)-CH$_{2}$-CH$_{2}$-Br. B) CH$_{3}$-CH(CH$_{2}$Br)-CH$_{2}$-CH$_{3}$. C) Br-CH$_{2}$-CH(CH$_{3}$)-CH$_{2}$-OH. D) CH$_{3}$-CH(CH$_{3}$)-CH$_{2}$(Br)-CH$_{3}$. Show Answer Correct Answer: A) CH$_{3}$-CH(CH$_{3}$)-CH$_{2}$-CH$_{2}$-Br. 11. P-dichlorobenzene has higher MELTING point than its o-and m-isomers. Why? A) O-dichlorobenzene is more polar than p-isomer. B) P-isomer has a symmetrical crystalline structure. C) Due to intra molecular H-bonding in o-isomer. D) All of these are correct. Show Answer Correct Answer: B) P-isomer has a symmetrical crystalline structure. 12. Which of the following could be the molecular formula for an alkane? A) C$_{7}$H$_{16}$. B) C$_{7}$H$_{14}$. C) C$_{7}$H$_{12}$. D) C$_{7}$H$_{10}$. Show Answer Correct Answer: A) C$_{7}$H$_{16}$. 13. Rank these in order of strength:covalent bondLondon forceshydrogen bonddipole-dipole attraction A) Dipole-dipole>covalent bond>hydrogen bond>London. B) London>dipole-diple>hydrogen bond>covalent bond. C) Covalent bond>hydrogen bond>dipole-dipole>London. D) Hydrogen bond>dipole-dipole>London>covalent bond. Show Answer Correct Answer: C) Covalent bond>hydrogen bond>dipole-dipole>London. 14. INORGANIC CHEMISTRY STUDY OF SUBSTANCES THAT DON'T CONTAIN CARBON BUT MAY CONTAIN WHICH ELEMENT A) SILCON. B) NITROGEN. C) HYDROGEN. D) OXYGEN. Show Answer Correct Answer: C) HYDROGEN. 15. What is the mechanism of the reaction between ethane and chlorine in sunlight? A) Free radical substitution. B) Free radical addition. C) Electrophilic substitution. D) Electrophilic addition. Show Answer Correct Answer: A) Free radical substitution. 16. How many covalent bonds must a Carbon atom form in a molecule? A) 2. B) 4. C) 6. D) 8. Show Answer Correct Answer: B) 4. 17. Which is the first organic compound that can be synthesized in the laboratory? A) Glucose:C$_{6}$H$_{12}$O$_{6}$. B) Urea:(NH$_{2}$)$_{2}$CO. C) Acetic acid:CH$_{3}$COOH. D) Methanol:CH$_{3}$OH. Show Answer Correct Answer: B) Urea:(NH$_{2}$)$_{2}$CO. 18. Aryl halides are LESS reactive towards nucleophilic substitution reactions as compared to alkyl halides due to A) Formation of a more stable carbonium ion in aryl halides. B) Resonance stabilization in aryl halides. C) Presence of double bonds in aryl halides. D) Inductive effect in aryl halides. Show Answer Correct Answer: B) Resonance stabilization in aryl halides. 19. An aryl alcohol can be found in which of the following compounds? A) Cyclohexanol. B) 1, 3, 5-cyclohexa-trien-1-ol. C) Benzyl alcohol. D) Benzene-1, 2-diol. Show Answer Correct Answer: D) Benzene-1, 2-diol. 20. Organic compounds made only of the elements carbon and hydrogen are called ..... A) Hydrocarbons. B) Carbohydrogens. C) Carbohydrates. D) Hydrocarbonates. Show Answer Correct Answer: A) Hydrocarbons. 21. Temperature at which vapour pressure becomes equal to atmospheric pressure is called A) Freezing point. B) Boiling point. C) Melting point. D) None of the above. Show Answer Correct Answer: B) Boiling point. 22. The functional group present in ether A) -CHO. B) -COOH. C) -O-. D) -CO-NH$_{2}$. Show Answer Correct Answer: C) -O-. 23. How many sigma bond in chlorobenzene A) 12. B) 15. C) 6. D) 10. Show Answer Correct Answer: A) 12. 24. Nature of bonding in carbon compounds is A) Metallic bonding. B) Ionic bonding. C) Covalent bonding. D) Hydrogen bonding. Show Answer Correct Answer: C) Covalent bonding. 25. Molecules with double/tripple bond A) Carbocilic acids. B) Alkynes. C) Unsaturated fats. D) Saturated fats. 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