This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part Ii > Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Compound Q has the following properties.-soluble in water-boiling point is 78$^{0}$CWhat is compound Q A) Ethanoic acid. B) Ethene. C) Ethane. D) Ethanol. Show Answer Correct Answer: D) Ethanol. 2. A bond in which a pair of electrons is shared between two atoms A) Ionic. B) Dipole-dipole. C) Anion. D) Covalent. Show Answer Correct Answer: D) Covalent. 3. The correct name of CH3CH2-C-CH-CHO || | O CN is A) 2-cyano-3-oxopentanal. B) 2-cyano-1, 3-pentadiene. C) 1, 3-dioxo-2-cyanopentane. D) 2-formyl-3-oxypentanenitrile. Show Answer Correct Answer: D) 2-formyl-3-oxypentanenitrile. 4. 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. 5. The removal of a small molecule along with the formation of a double bond is known as a(n) A) Addition reaction. B) Condensation reaction. C) Substitution reaction. D) Elimination reaction. Show Answer Correct Answer: D) Elimination reaction. 6. Saturated hydrocarbons usually undergoes A) Addition reactions. B) Substitution reactions. C) Combustion reactions. D) Esterification reactions. Show Answer Correct Answer: B) Substitution reactions. 7. 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. 8. Which among the following does not exhibit geometric isomerism? A) 3-hexene. B) 2-hexene. C) 1-hexene. D) 4-hexene. Show Answer Correct Answer: C) 1-hexene. 9. 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=10%, H=8.2%, O=81.8%. B) C=20%, H=6.66%, O=73.34%. C) C=12.2%, H=8.8%, O=79%. D) C=15%, H=20%, O=65%. Show Answer Correct Answer: B) C=20%, H=6.66%, O=73.34%. 10. Chemical substances used to reduce body temperature A) Analegesic. B) Antitussive. C) Anaesthetic. D) Antipyretic. Show Answer Correct Answer: D) Antipyretic. 11. If the general formula of hydrocarbons is C(n)H(2n+2), a hydrocarbon with 15 carbons will have ..... hydrogens. A) 32. B) 28. C) 17. D) 30. Show Answer Correct Answer: A) 32. 12. Which one of the following acids would you expect to be the strongest? A) Br-CH$_{2}$COOH. B) I-CH$_{2}$COOH. C) F-CH$_{2}$COOH. D) Cl-CH$_{2}$COOH. Show Answer Correct Answer: C) F-CH$_{2}$COOH. 13. Choose an organic compound A) CO$_{2}$. B) HCN. C) CCl$_{4}$. D) CO. Show Answer Correct Answer: C) CCl$_{4}$. 14. On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane. This alkane could be A) Neopentane. B) Pentane. C) Propane. D) Isopentane. Show Answer Correct Answer: A) Neopentane. 15. What chemicals are found in crude oil? A) Carbon only. B) A mixture of elements. C) Methane only. D) A mixture of compounds, which are mostly hydrocarbons. Show Answer Correct Answer: D) A mixture of compounds, which are mostly hydrocarbons. 16. 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. 17. Electrons shared between 2 atoms where electronegativity is <0.5 A) Anion. B) Ionic. C) Polar covalent. D) Covalent. Show Answer Correct Answer: D) Covalent. 18. 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. 19. 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. 20. How many organic materials do we have approx? A) 1000.000. B) 1000.000.000. C) 100.000.000. D) 100.000. Show Answer Correct Answer: C) 100.000.000. 21. In Lassaigne's test for N, S and halogens, the organic compound is A) Extracte with sodamide. B) Fused with sodium. C) Fused with calcium. D) Dissolved with sodamide. Show Answer Correct Answer: B) Fused with sodium. 22. What is the "ending" used in alcohols? A) Alco. B) Ol. C) Oilo. D) Al. Show Answer Correct Answer: B) Ol. 23. 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. 24. Which functional group contains a nitrogen atom? A) Ester. B) Amine. C) Ketone. D) Alkene. Show Answer Correct Answer: B) Amine. 25. 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. 26. It is used for storing energy for long term, it also serve as leaves waterproof covering. A) Nucleic acid. B) Carbohydrates. C) Protein. D) Lipids. Show Answer Correct Answer: D) Lipids. 27. The reaction of obtaining rubbers A) Isomerization. B) Polymerization. C) Hydrogenation. D) Polycondensation. Show Answer Correct Answer: B) Polymerization. 28. What is the suffix used for alcohol series A) Al. B) Ol. C) Oh. D) None of the above. Show Answer Correct Answer: B) Ol. 29. Review from Module 4:What is activation energy? A) Minimum amount of energy required to start a chemical reaction. B) The maximum amount of energy required to start a chemical reaction. C) The energy released during a chemical reaction. D) The energy required to stop a chemical reaction. Show Answer Correct Answer: A) Minimum amount of energy required to start a chemical reaction. 30. Types of stereo-isomerism are optical isomerism and A) Cis-isomerism. B) Trans-isomerism. C) Cis-trans isomerism. D) All of them. Show Answer Correct Answer: C) Cis-trans isomerism. 31. In the hybridization of acetylene, how many unpaired atomic orbitals are there? A) 2. B) 1. C) 4. D) 3. Show Answer Correct Answer: A) 2. 32. Which of the following is a characteristic of a homologous series in organic chemistry? A) They have the same functional group and differ by a $CH_2$. B) They have different functional groups and differ by a $CH_3$. C) They have the same molecular formula but different structures. D) They have different molecular formulas and different structures. Show Answer Correct Answer: A) They have the same functional group and differ by a $CH_2$. 33. What functional group is present in an amine? A) Carbonyl group (C=O). B) Phosphate group (PO4). C) Hydroxyl group (-OH). D) Amino group (-NH2). Show Answer Correct Answer: D) Amino group (-NH2). 34. The basic form of matter is the A) Molecule. B) Proton. C) Atom. D) None of the above. Show Answer Correct Answer: C) Atom. 35. Organic compounds are classified according to their A) Period. B) Chemical reactions. C) Groups. D) Homologous series. Show Answer Correct Answer: D) Homologous series. 36. During sodium extract preparation for Lassaigne's test both N and S present in organic compound change to A) NaSCN. B) NaCN and Na$_{2}$S. C) NaNO$_{3}$ and Na$_{2}$S. D) NaNH$_{2}$ and Na$_{2}$SO$_{4}$. Show Answer Correct Answer: A) NaSCN. 37. Which of the following compound has gauche as it stable conformer? A) N-butane. B) N-propane. C) 1, 2-dihydroxyethane. D) 1, 2-dicloroethane. Show Answer Correct Answer: C) 1, 2-dihydroxyethane. 38. Which of the following is not a functional group isomer? A) Methyl alcohol and dimethyl ether. B) Ethyl alcohol and dimethyl ether. C) Acetone and acetaldehyde. D) Propionic acid and propanone. Show Answer Correct Answer: A) Methyl alcohol and dimethyl ether. 39. The vacancy of carbon is A) 3. B) 5. C) 4. D) None of the above. Show Answer Correct Answer: C) 4. 40. A sigma bond occurs when atomic orbitals directly overlap A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 41. What is the name of the alkane with two carbon atoms? A) Methane. B) Propane. C) Butane. D) Ethane. Show Answer Correct Answer: D) Ethane. 42. A molecule of 2, 3 dimethyl hexane would have how many TOTAL carbons? A) 7. B) 9. C) 8. D) 6. Show Answer Correct Answer: C) 8. 43. Which trend(s) in physical properties is/are true for alkanes with increasing molecular mass? A) Melting and boiling points decrease. B) Density decreases. C) Viscosity increases. D) Flammability increases. Show Answer Correct Answer: C) Viscosity increases. 44. The suffix used for the ketones A) Ke. B) One. C) Ol. D) Al. Show Answer Correct Answer: B) One. 45. Which compound can both be esterified and turn acidified potassium dichromate(VI) solution green? A) CH$_{3}$CH$_{2}$CO$_{2}$H. B) (CH$_{3}$)$_{3}$COH. C) CH$_{3}$CH$_{2}$COCH$_{3}$. D) (CH$_{3}$)$_{2}$CHOH. Show Answer Correct Answer: D) (CH$_{3}$)$_{2}$CHOH. 46. Petroleum and natural gas form from ..... A) Strong winds. B) Cooled magma. C) Radioactive materials. D) Remains of plants and animals. Show Answer Correct Answer: D) Remains of plants and animals. 47. In an organic chemistry experiment, which reagent is commonly used to oxidize primary alcohols to aldehydes? A) NaBH 4. B) LiAlH 4. C) PCC (Pyridinium chlorochromate). D) KMnO 4. Show Answer Correct Answer: C) PCC (Pyridinium chlorochromate). 48. Can 2-cyanopentane exists as a pair of enantiomers? A) Yes, because it is a electrophlie. B) No, it is not an optical isomer. C) Yes, because it contains a chiral carbon bonded to four different atoms or groups. D) None of the above. Show Answer Correct Answer: C) Yes, because it contains a chiral carbon bonded to four different atoms or groups. 49. The IUPAC name of methyl acetylene is: A) Ethene. B) Propyne. C) Ethyne. D) Propane. Show Answer Correct Answer: B) Propyne. 50. This theory states that organic compounds must contain a peculiar vital force A) Hybridization. B) Vital Force Theory. C) VSEPR Theory. D) Valence Bond Theory. Show Answer Correct Answer: B) Vital Force Theory. 51. Match the name of the straight-chain alkane with the number of atoms it contains:Propane A) 9. B) 7. C) 3. D) 4. Show Answer Correct Answer: C) 3. 52. Reduction of etylethanoate(CH$_{3}$COOCH$_{2}$CH$_{3}$) In presence of LiAlH$_{4}$ Produces A) 2 moles of methylalcohol. B) 1 mole of propylacohol. C) 2 moles of ethylacohol. D) 1 mole of ethylacohol. Show Answer Correct Answer: C) 2 moles of ethylacohol. 53. Isopropyl magnesium bromide reacts with propyne to form A) 2-Methylpropane. B) Propane. C) Hexane. D) Hex-3-yne. Show Answer Correct Answer: B) Propane. 54. Which are features of successive members of a homologous series?I. Similar chemical propertiesII. Same general formulaIII. Differ by-CH$_{2}$- A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: D) I, II and III. 55. Identify the class of organic compounds to which CH$_{3}$COOCH$_{2}$CH$_{3}$ belongs. A) Alcohol. B) Ester. C) Organic Acid. D) Ether. Show Answer Correct Answer: B) Ester. 56. The compound CHO is ..... A) Inorganic. B) Organic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Organic. 57. ..... gives you long term energy, but eating too much will deposit it around the body ): A) Fats. B) Proteins. C) Complex Carbs. D) Simple Carbs. Show Answer Correct Answer: A) Fats. 58. The number of structural and configurational isomers of a bromo compound, C$_{5}$H$_{9}$Br, formed by the addition of HBr to 2-pentyne respectively are, A) 2 and 4. B) 2 and 1. C) 4 and 2. D) 1 and 2. Show Answer Correct Answer: A) 2 and 4. 59. Which of the following molecules exhibit geometrical isomerism? A) CH$_{2}$=CHCH$_{3}$. B) CH$_{3}$CH$_{2}$N=OH. C) C$_{6}$H$_{5}$CH=CHC$_{6}$H$_{5}$. D) (CH$_{3}$)$_{2}$C=CHCH$_{3}$. Show Answer Correct Answer: C) C$_{6}$H$_{5}$CH=CHC$_{6}$H$_{5}$. 60. When writing names for organic compounds, commas separate ..... A) Numbers. B) Names from numbers. C) All the above. D) None of the above. Show Answer Correct Answer: A) Numbers. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 1Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 2Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 3Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 4Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 6Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 7Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 8Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books