This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The correct name of CH3CH2-C-CH-CHO || | O CN is A) 2-cyano-1, 3-pentadiene. B) 1, 3-dioxo-2-cyanopentane. C) 2-formyl-3-oxypentanenitrile. D) 2-cyano-3-oxopentanal. Show Answer Correct Answer: C) 2-formyl-3-oxypentanenitrile. 2. Which alcohol and acid can be reacted together to make the ester CH$_{3}$CH$_{2}$CH$_{2}$CO$_{2}$CH$_{3}$? A) C$_{4}$H$_{9}$OH and HCO$_{2}$H. B) C$_{3}$H$_{7}$OH and CH$_{3}$CO$_{2}$H. C) C$_{2}$H$_{5}$OH and C$_{2}$H$_{5}$CO$_{2}$H. D) CH$_{3}$OH and C$_{3}$H$_{7}$CO$_{2}$H. Show Answer Correct Answer: D) CH$_{3}$OH and C$_{3}$H$_{7}$CO$_{2}$H. 3. The removal of a small molecule along with the formation of a double bond is known as a(n) A) Elimination reaction. B) Addition reaction. C) Substitution reaction. D) Condensation reaction. Show Answer Correct Answer: A) Elimination reaction. 4. Saturated hydrocarbons usually undergoes A) Addition reactions. B) Substitution reactions. C) Combustion reactions. D) Esterification reactions. Show Answer Correct Answer: B) Substitution reactions. 5. The unsaturated hydrocarbons undergo: A) A substitution reaction. B) An oxidation reaction. C) An addition reaction. D) None of the above. Show Answer Correct Answer: C) An addition reaction. 6. Which among the following does not exhibit geometric isomerism? A) 1-hexene. B) 2-hexene. C) 3-hexene. D) 4-hexene. Show Answer Correct Answer: A) 1-hexene. 7. Of an organic compound contains C, H and O. On combustion, it yields 015g CO$_{2}$ and 0.12g H$_{2}$O. The percentage of C, H and O respectively is A) C=12.2%, H=8.8%, O=79%. B) C=20%, H=6.66%, O=73.34%. C) C=15%, H=20%, O=65%. D) C=10%, H=8.2%, O=81.8%. Show Answer Correct Answer: B) C=20%, H=6.66%, O=73.34%. 8. Chemical substances used to reduce body temperature A) Analegesic. B) Antipyretic. C) Anaesthetic. D) Antitussive. Show Answer Correct Answer: B) Antipyretic. 9. If the general formula of hydrocarbons is C(n)H(2n+2), a hydrocarbon with 15 carbons will have ..... hydrogens. A) 32. B) 30. C) 17. D) 28. Show Answer Correct Answer: A) 32. 10. Which one of the following acids would you expect to be the strongest? A) F-CH$_{2}$COOH. B) Cl-CH$_{2}$COOH. C) Br-CH$_{2}$COOH. D) I-CH$_{2}$COOH. Show Answer Correct Answer: A) F-CH$_{2}$COOH. 11. Choose an organic compound A) CO. B) CO$_{2}$. C) HCN. D) CCl$_{4}$. Show Answer Correct Answer: D) CCl$_{4}$. 12. On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane. This alkane could be A) Pentane. B) Isopentane. C) Neopentane. D) Propane. Show Answer Correct Answer: C) Neopentane. 13. What chemicals are found in crude oil? A) Methane only. B) A mixture of compounds, which are mostly hydrocarbons. C) A mixture of elements. D) Carbon only. Show Answer Correct Answer: B) A mixture of compounds, which are mostly hydrocarbons. 14. Which of the following statements is true about isomers? A) They have the same molecular formula but different structural formulas. B) They have different molecular formulas and different structural formulas. C) They have the same structural formula but different molecular formulas. D) They have identical physical and chemical properties. Show Answer Correct Answer: A) They have the same molecular formula but different structural formulas. 15. Electrons shared between 2 atoms where electronegativity is <0.5 A) Covalent. B) Polar covalent. C) Ionic. D) Anion. Show Answer Correct Answer: A) Covalent. 16. Which reaction that releases oxidising agents, heat and light A) Substitution. B) Combustion. C) Addition. D) None of the above. Show Answer Correct Answer: B) Combustion. 17. Which of the following intermediates contains three pairs of electrons in its valence shell? A) Carbanions. B) Carbanions. C) Free radicals. D) Both (a) and (b). Show Answer Correct Answer: A) Carbanions. 18. How many organic materials do we have approx? A) 100.000. B) 1000.000. C) 100.000.000. D) 1000.000.000. Show Answer Correct Answer: C) 100.000.000. 19. In Lassaigne's test for N, S and halogens, the organic compound is A) Dissolved with sodamide. B) Fused with calcium. C) Fused with sodium. D) Extracte with sodamide. Show Answer Correct Answer: C) Fused with sodium. 20. What is the "ending" used in alcohols? A) Al. B) Ol. C) Oilo. D) Alco. Show Answer Correct Answer: B) Ol. 21. What happens to the boiling point and flammability of hydrocarbons as the length of the molecules increases? A) Longer hydrocarbons have lower boiling points and are less flammable. B) Longer hydrocarbons have higher boiling points and are more flammable. C) Longer hydrocarbons have lower boiling points and are more flammable. D) Longer hydrocarbons have higher boiling points and are less flammable. Show Answer Correct Answer: D) Longer hydrocarbons have higher boiling points and are less flammable. 22. Which functional group contains a nitrogen atom? A) Alkene. B) Ketone. C) Ester. D) Amine. Show Answer Correct Answer: D) Amine. 23. Assertion:The C-O bond is shorter in aryl alcohols than in alkyl alcohols.Reason:'O' atom of hydroxyl group is electronegetive. A) Both assertion and reason are correct and reason is the correct explanation of assertion. B) Assertion is wrong but reason is correct. C) Both assertion and reason are correct but reason is not the correct explanation of assertion. D) Assertion is correct but reason is wrong. Show Answer Correct Answer: C) Both assertion and reason are correct but reason is not the correct explanation of assertion. 24. It is used for storing energy for long term, it also serve as leaves waterproof covering. A) Lipids. B) Carbohydrates. C) Protein. D) Nucleic acid. Show Answer Correct Answer: A) Lipids. 25. The reaction of obtaining rubbers A) Hydrogenation. B) Polymerization. C) Isomerization. D) Polycondensation. 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