This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 23 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which one of the following pairs of reagents reacts to form an organic product that shows only 2 peaks in its proton n.m.r. spectrum? A) Butan-2-ol and acidified potassium dichromate(VI). B) Ethanoyl chloride and methanol. C) Propanoic acid and ethanol in the presence of concentrated sulphuric acid. D) Ethene and hydrogen in the presence of nickel. Show Answer Correct Answer: B) Ethanoyl chloride and methanol. 2. What is the molecular formula of the CH$_{3}$CH$_{2}$N(CH$_{3}$)C(CH$_{3}$)$_{3}$? A) C$_{5}$H$_{15}$N. B) C$_{7}$H$_{17}$N. C) C$_{6}$H$_{16}$N$_{2}$. D) C$_{6}$H$_{15}$N. Show Answer Correct Answer: B) C$_{7}$H$_{17}$N. 3. All molecules of the alkane homologous series have which ending in their name? A) -ane. B) -ene. C) -anol. D) -anoic acid. Show Answer Correct Answer: A) -ane. 4. Given below are the structures of few compounds with molecular formula C$_{4}$H$_{10}$O. Select metamers from these structures.i) CH$_{3}$-O-CH$_{2}$CH$_{2}$CH$_{3}$ii) CH$_{3}$CH$_{2}$CH$_{2}$CH$_{2}$OHiii) CH$_{3}$-CH$_{2}$-O-CH$_{2}$-CH$_{3}$iv) CH$_{3}$-CH-CH$_{2}$-CH$_{3}$ |OH A) (i) and (ii). B) (ii) and (iii). C) (i) and (iii). D) (ii) and (iv). Show Answer Correct Answer: C) (i) and (iii). 5. Which of the following is an example of an element? A) Water (H$_{2}$O. B) Table salt (NaCl). C) Nitrogen (N). D) None of the above. Show Answer Correct Answer: C) Nitrogen (N). 6. The preparations of three substances are given.1 an ester from an alcohol and a carboxylic acid2 ethanol from ethene3 margarine from a vegetable oilIn which preparations are one or more double bonds converted to single bonds? A) 1 and 2. B) 1 only. C) 2 and 3. D) 3 only. Show Answer Correct Answer: C) 2 and 3. 7. Why does carbon form compounds mainly by covalent bonding? A) There are four electrons in the outermost shell of carbon. B) It requires large amount of energy to form C$^{4+}$ or C$^{4-}$. C) It shares its valence electrons to complete its octet. D) All the above. Show Answer Correct Answer: D) All the above. 8. Atoms are bonded together in different orders. A) Structural Isomers. B) Benzene. C) Structural Formula. D) Catenation. Show Answer Correct Answer: A) Structural Isomers. 9. Calculate number of sigma and p bonds in the structures 2-methylbutene-2 A) 14 sigma, 1 p. B) 14 sigma, 2 p. C) 15 sigma, 0 p. D) 11 sigma, 2 p. E) 10 sigma, 3 p. Show Answer Correct Answer: A) 14 sigma, 1 p. 10. What is the simplest alkyne? A) Methyne. B) Ethyne. C) Propyne. D) Butyne. Show Answer Correct Answer: B) Ethyne. 11. Can enantiomer rotates plane-polarised light? A) Yes in all situations. B) No because it is optically active. C) Yes but it can only rotate the polarised light in opposite direction. D) No due to its restricted rotation of carbon-carbon double bond. Show Answer Correct Answer: C) Yes but it can only rotate the polarised light in opposite direction. 12. What are the hybridization and shapes of the following molecules?i) CH$_{3}$Fii) HCN A) (i) sp$^{2}$, trigonal planar; (ii) sp$^{2}$, trigonal planar. B) (i) sp, linear; (ii) sp$^{2}$, trigonal planar. C) (i) sp$^{2}$, trigonal planar; (ii) sp$^{3}$, tetrahedral. D) (i) sp$^{3}$, tetrahedral; (ii) sp, linear. Show Answer Correct Answer: D) (i) sp$^{3}$, tetrahedral; (ii) sp, linear. 13. Chlorination of alkanes is an example of A) Elimination reaction. B) Free radical substitution reaction. C) Nucleophilic substitution reaction. D) Electrophilic addition reaction. Show Answer Correct Answer: B) Free radical substitution reaction. 14. Which of the following is NOT true about nucleophiles? A) Donates an electron pair to an electrophile to form a chemical bond. B) All molecules or ions with a free pair of electrons or at least one pi bond can act as nucleophiles. C) Nucleophile are Lewis acids by definition. D) A nucleophile becomes attracted to a full or partial positive charge. Show Answer Correct Answer: C) Nucleophile are Lewis acids by definition. 15. An important type of protein that serve as catalysts for chemical reactions: A) Enzyme. B) Nitrogen base. C) Cellulose. D) Keratin. Show Answer Correct Answer: A) Enzyme. 16. Cumulated Diene is also known as A) Conjugated diene. B) Isolated diene. C) Annulene. D) None. Show Answer Correct Answer: C) Annulene. 17. What is the shape for sp3 hybridized orbital in CH4? A) Linear. B) Tetrahedral. C) Trigonal planar. D) Trigonal bipyramidal. Show Answer Correct Answer: B) Tetrahedral. 18. Which of the following is not a halide? A) Cl. B) S. C) Br. D) I. Show Answer Correct Answer: B) S. 19. Is a main kind of organic compound, made out of fatty acids, they made up the cell membrane. A) Nucleic Acids. B) Lipids. C) Proteins. D) Carbohydrates. Show Answer Correct Answer: B) Lipids. 20. What is the functional group present in aldehydes? A) Alcohol group. B) Amine group. C) Carboxyl group. D) Carbonyl group. Show Answer Correct Answer: D) Carbonyl group. 21. What is the simplest alkene? A) Ethene. B) Methene. C) Propene. D) Nonene. Show Answer Correct Answer: A) Ethene. 22. The empirical formula for benzene is A) CH. B) C$_{2}$H$_{2}$. C) C$_{3}$H$_{3}$. D) C$_{6}$H$_{6}$. Show Answer Correct Answer: A) CH. 23. If sugar is made up of single unit it is called? A) Oligosaccharide. B) Polysaccharide. C) Monosaccharide. D) Disaccharide. Show Answer Correct Answer: C) Monosaccharide. 24. Used in gas cooker A) Kerosene. B) Fuel oil. C) Bitumen. D) Refinery gas. Show Answer Correct Answer: D) Refinery gas. 25. What is the suffix used for ketone? A) -oic. B) -ane. C) -one. D) -ol. 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