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 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Freshly prepared solution of sodium nitroprusside is added to the sodium extract. Appearance of deep voilet colouf indicates the presence of A) Halogen. B) Sulphur. C) Both nitrogen and sulphur. D) Nitrogen. Show Answer Correct Answer: B) Sulphur. 2. Carbon compounds which has only single bonds are called A) Butane. B) Saturated compounds. C) Unsaturated compounds. D) Methane. Show Answer Correct Answer: B) Saturated compounds. 3. How is a Carboxyl Group commonly written? A) -COH. B) -OH. C) -CHOH. D) -COOH. Show Answer Correct Answer: D) -COOH. 4. Type of hybridization of electron clouds of carbon atoms in alkanes A) Sp-. B) -sp2. C) -sp3. D) S-s and p-p. Show Answer Correct Answer: C) -sp3. 5. The longer the hydrocarbon, the ..... the flammability? A) Lower. B) Higher. C) All the above. D) None of the above. Show Answer Correct Answer: A) Lower. 6. There are ..... organic compounds known to scientists. A) 9000. B) 900. C) 9 million. D) 9. E) 90. Show Answer Correct Answer: C) 9 million. 7. Which of the following is known as Baker-Nathan effect? A) Hyperconjugation. B) Electromeric effect. C) Inductive effect. D) Mesomeric effect. Show Answer Correct Answer: A) Hyperconjugation. 8. The specific rotation of pure (R)-2-butanol is-13.5$^\circ$. What % of a mixture of the two enantiomeric forms is (S)-2-butanol if the specific rotation of this mixture is-5.4$^\circ$? A) 40%. B) 30%. C) 70%. D) 60%. E) None of the above. Show Answer Correct Answer: A) 40%. 9. Which of the following will not give a white ppt, when AgNO$_{3}$ is added to its solution? A) CCl$_{4}$. B) KCl. C) NaCl. D) MgCl$_{2}$. Show Answer Correct Answer: A) CCl$_{4}$. 10. Which of the following groups can be classified as carbonyls? A) Aldehydes. B) Ketones. C) Esters. D) Aldehydes and ketones. Show Answer Correct Answer: D) Aldehydes and ketones. 11. The iupac name of 7 A) Propane. B) Seven. C) Ethane. D) None of the above. Show Answer Correct Answer: A) Propane. 12. Which of the following is more reactive towards electrophilic substitution? A) Toluene. B) Cholorobenzene. C) O-Nitrotoluene. D) Nitrobenzene. Show Answer Correct Answer: A) Toluene. 13. Which Hydrocarbon is More Volatile? A) Longer Hydrocarbon Chain. B) Shorter Hydrocarbon Chain. C) All the above. D) None of the above. Show Answer Correct Answer: B) Shorter Hydrocarbon Chain. 14. The class of alkynes includes A) C2H4. B) C2H6. C) CH4. D) C2H2. Show Answer Correct Answer: D) C2H2. 15. Which reagent is needed to change CH$_{3}$CH=CH$_{2 }$to CH$_{3}$CHClCH$_{3}$ A) HCl. B) PCl$_{3}$. C) SOCl$_{2}$. D) Cl$_{2}$ (aq). Show Answer Correct Answer: A) HCl. 16. What are the required reagents / conditions for the reaction below?CH$_{3}$CH$_{2}$Br $\rightarrow$ C$_{2}$H$_{4}$ A) H$_{2}$ / Ni catalyst / 150$^{o}$C. B) H$_{2}$O / H$_{3}$PO$_{4}$ catalyst / high pressure. C) Concentrated KOH / ether / high temperature. D) Concentrated HCl / ethanol / high temperature. Show Answer Correct Answer: C) Concentrated KOH / ether / high temperature. 17. Element bonds join together to form A) A friendship. B) More bonds. C) Energy. D) None of the above. Show Answer Correct Answer: C) Energy. 18. General formula for alkene A) CH. B) C$_{n}$H$_{2n-2}$. C) C$_{n}$H$_{2n+2}$. D) C$_{n}$H$_{2n}$. Show Answer Correct Answer: D) C$_{n}$H$_{2n}$. 19. Which compound is not in the same homologous series as the others? A) C6H12. B) C7H16. C) C8H18. D) C5H12. Show Answer Correct Answer: A) C6H12. 20. The name of this compaund C$_{4}$H$_{10}$ A) BUTANE. B) BUTANOIC ACID. C) HEXENE. D) METHANE. Show Answer Correct Answer: A) BUTANE. 21. Which homolgous series contains only C-C single bonds? A) Carboxylic acids. B) Alcohols. C) Alkanes. D) Alkenes. Show Answer Correct Answer: C) Alkanes. 22. A condition that occurs when more than one valid Lewis structure can be drawn for a molecule A) Resonance. B) Structural formula. C) Endothermic. D) Coordinate covalent bond. Show Answer Correct Answer: A) Resonance. 23. What is the number of missing hydrogen atoms in the following structure? C-O-C-C A) 7. B) 6. C) 8. D) 5. Show Answer Correct Answer: C) 8. 24. To convert propene to propan-2-ol, reagent used is A) Acidified permanganate. B) Ammonia. C) Dilute sulfuric acid. D) Concentrated sulfuric acid. Show Answer Correct Answer: C) Dilute sulfuric acid. 25. Which of the following is a false statement? A) Homolytic fission Of C-C bonds gives free radicals. B) Free radicals, carbonium ions or carbanions are reaction intermediates. C) Reaction between methane and chlorine in presence of sunlight proceeds via free radical. D) The electronegative atom in the carbon chain produces +I effect. Show Answer Correct Answer: D) The electronegative atom in the carbon chain produces +I effect. 26. What is the functional group present in alcohols? A) Carboxyl group (-COOH). B) Hydroxyl group (-OH). C) Carbonyl group (C=O). D) Amino group (-NH2). Show Answer Correct Answer: B) Hydroxyl group (-OH). 27. Which of the following is an electrophilic reagent? A) NO$^{+}$$_{2}$. B) OH$^{-}$. C) H$_{2}$O. D) NH$_{3}$. Show Answer Correct Answer: A) NO$^{+}$$_{2}$. 28. How many bonds does Carbon need to become stable? A) 3. B) 1. C) 4. D) 2. Show Answer Correct Answer: C) 4. 29. The compounds which contain only carbon and hydrogen are called ..... A) Alkenes. B) Alkanes. C) Organic compounds. D) Hydrocarbons. Show Answer Correct Answer: D) Hydrocarbons. 30. The boiling point of hydrocarbons (alkanes, alkenes and alkynes) A) Increases when the number of CARBONS increases. B) Increases when the number of HYDROGEN increases. C) Doesn't depend on the number of carbons. D) None of the above. Show Answer Correct Answer: A) Increases when the number of CARBONS increases. 31. What is the product of the reaction between an alcohol and a carboxylic acid? A) Aldehyde. B) Ketone. C) Ester. D) Amine. Show Answer Correct Answer: C) Ester. 32. The isomers butane and methylpropane have A) The same molecular formula and the same properties. B) The same molecular formula and different properties. C) Different molecular formulas and the same properties. D) Different molecular formulas and different properties. Show Answer Correct Answer: B) The same molecular formula and different properties. 33. The addition of unsymmetrical reagent to an unsymmetrical alkene is according to ..... rule A) Markonikov. B) Octet. C) Avogadro. D) Lewis. Show Answer Correct Answer: A) Markonikov. 34. Which of the following is a permanent electron displacement effect? A) Electromeric. B) Inductive. C) Hyperconjugation. D) Resonance. Show Answer Correct Answer: B) Inductive. 35. Formal charges must always be written/drawn A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 36. How many bonds are there between the carbon atoms in unsaturated hydrocarbons? A) 2 or 3. B) 3. C) 2. D) 1. Show Answer Correct Answer: A) 2 or 3. 37. What is the prefix used when referring to ring structures? A) Pyro-. B) Aro-. C) Cyclo-. D) None of the above. Show Answer Correct Answer: C) Cyclo-. 38. Which alcohol when oxidized produces aldehydes? A) Secondary. B) Quartener. C) Primer. D) Tertiary. Show Answer Correct Answer: C) Primer. 39. To convert ethene to Ethan-1, 2-diol reagent used is A) Dilute sufuric acid. B) Acidified permanganate. C) Potassium trichloride. D) KOH. Show Answer Correct Answer: B) Acidified permanganate. 40. What is the name of the process in which one orbital "S" and three orbitals "P" combined to form new orbitals? A) Joining. B) Hydrozation. C) Hybridization. D) Combining. Show Answer Correct Answer: C) Hybridization. 41. A kind of heterogenous mixture where large particles settle down. An example of this is paracetamol syrup. A) Solution. B) Colloid. C) Suspension. D) None of the above. Show Answer Correct Answer: C) Suspension. 42. The term ..... means "water-fearing", and these will not dissolve in water. A) Catalyst. B) Soluble. C) Hydrophilic. D) Hydrophobic. Show Answer Correct Answer: D) Hydrophobic. 43. What is Vis vitalis? A) A force that was believed to make things grow old. B) A force that was believed to hold organic materials together. C) A chemical bonding believed to exist between materials inthe human body. D) A force that is proven to hold organic materials in the human body. Show Answer Correct Answer: B) A force that was believed to hold organic materials together. 44. The substituent that has three carbons in the form of a Y is called A) Propyl. B) Iso. C) Isopropyl. D) None of the above. Show Answer Correct Answer: C) Isopropyl. 45. In organic chemistry, commas separate ..... A) Numbers. B) Names from numbers. C) All the above. D) None of the above. Show Answer Correct Answer: A) Numbers. 46. Molecule with the same molecular structure but different structural formula A) Fats. B) Lipids. C) Isomers. D) Fossil fuels. Show Answer Correct Answer: C) Isomers. 47. What is the minimum number of carbon atoms of an alkane must have to form an isomer? A) Ring-chain isomerism. B) Functional isomerism. C) Position isomerism. D) Metamerism. Show Answer Correct Answer: A) Ring-chain isomerism. 48. 1-ethanol belongs to which Alcohol group? A) Primer. B) Tertier. C) Quartener. D) Secondary. Show Answer Correct Answer: A) Primer. 49. Which organic compound reacts with acidified potassium manganate(VII) solution, causing a colour change? A) Ethane. B) Ethanol. C) Ethanoic acid. D) Poly(ethene). Show Answer Correct Answer: B) Ethanol. 50. Which of the following is the general formula for an Aldehyde? A) ROH. B) RCHO. C) RCOOH. D) ROR. E) C=O. Show Answer Correct Answer: B) RCHO. 51. On increasing the number of $\alpha$-hydrogens, the number of hyperconjugation structures will A) Decrease. B) Increase. C) Remains same. D) None of the mentioned. Show Answer Correct Answer: B) Increase. 52. Which Hydrocarbon has a Higher Viscosity? A) Longer Hydrocarbon Chain. B) Shorter Hydrocarbon Chain. C) All the above. D) None of the above. Show Answer Correct Answer: A) Longer Hydrocarbon Chain. 53. A hydrocarbon has 5 C atoms with 1 double bond and a functional group "alcohol" . What will be the name of this hydrocarbon? A) Propanol. B) Pentanal. C) Pentenol. D) Propanal. Show Answer Correct Answer: C) Pentenol. 54. Choose the incorrect option regarding isomerism: A) They differ in both physical and chemical properties. B) They have different molecular formula. C) There are two types of isomerism; structural and stereoisomerism. D) Geometrical and optical isomerism are two types of stereoisomerism. Show Answer Correct Answer: B) They have different molecular formula. 55. Protocatechuic acid is A) 2, 4-dihydroxy benzoic acid. B) Diamino benzoic acid. C) 3, 4-dihydroxy benzoic acid. D) 1, 2-dihydroxy benzoic acid. Show Answer Correct Answer: C) 3, 4-dihydroxy benzoic acid. 56. In an experiment, a student adds bromine water to an unknown hydrocarbon and observes that the solution decolorizes. What type of hydrocarbon is the unknown compound likely to be? A) Alkane. B) Alkene. C) Aromatic. D) Alkyne. Show Answer Correct Answer: B) Alkene. 57. Select the incorrect statement from the following option. A) Racemic modification is an equimolar mixture of dextrorotatory and levorotatory isomers. B) Meso compounds contain more than one chiral carbon centre. C) Meso compounds are externally compensated. D) Racemic mixture is designated as dl-pair. Show Answer Correct Answer: C) Meso compounds are externally compensated. 58. When the HBr is added to propene the product/ products formed is/are A) 2-bromopropane. B) Propanamine. C) 1-bromopropane. D) 2-bromopropane and 1-bromopropane. Show Answer Correct Answer: D) 2-bromopropane and 1-bromopropane. 59. In an experiment, which reagent is used to test for the presence of unsaturation in hydrocarbons? A) Limewater. B) Iodine solution. C) Benedict's solution. D) Bromine water. Show Answer Correct Answer: D) Bromine water. 60. ..... geometry is described for only the atoms bonded to the central atom A) Shape. B) Electron. C) Molecular. D) Atomic. Show Answer Correct Answer: C) Molecular. ← 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 4Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 5Class 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