This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 12 Organic Chemistry Basic Principles And Techniques Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which compound could be X in the two-stage reaction pathway?C$_{2}$H$_{4}$ $\rightarrow$ X $\rightarrow$ C$_{2}$H$_{5}$OH A) C$_{2}$H$_{6}$. B) C$_{2}$H$_{3}$OH. C) C$_{2}$H$_{5}$Br. D) C$_{2}$H$_{4}$Cl$_{2}$. Show Answer Correct Answer: C) C$_{2}$H$_{5}$Br. 2. The suffix used for alkynes A) Ane. B) Ene. C) Yne. D) All. Show Answer Correct Answer: C) Yne. 3. Fraction with the highest boiling point A) Bitumen. B) Refinery gas. C) Petroleum. D) Diesel. Show Answer Correct Answer: A) Bitumen. 4. The compounds CH$_{3}$CH$_{2}$CH$_{2}$OH and CH$_{3}$OCH$_{2}$CH$_{3}$ have different A) Numbers of carbon atoms per mole. B) Numbers of hydrogen atoms per mole. C) Functional groups. D) Molecular masses. Show Answer Correct Answer: C) Functional groups. 5. Match the name of the straight-chain alkane with the number of atoms it contains:Butane A) 3. B) 4. C) 7. D) 9. Show Answer Correct Answer: B) 4. 6. What is the main constituent of Natural Gas? A) Ethene. B) Helium. C) Hydrogen. D) Methane. Show Answer Correct Answer: D) Methane. 7. At a given temperature, the osmotic pressure of a solution is directly proportional to A) Concentration. B) Volume. C) Quantity. D) None of the above. Show Answer Correct Answer: A) Concentration. 8. Which one is an Alkane? A) Has a C C Single Bond. B) Has a C==C Double Bond. C) All the above. D) None of the above. Show Answer Correct Answer: A) Has a C C Single Bond. 9. The first four alkanes are listed below. In which list are they placed in the correct order, i.e. increasing number of carbon atoms? A) Methane, ethane, propane, butane. B) Ethane, methane, propane, butane. C) Methane, ethane, butane, propane. D) Methane, propane, ethane, butane. Show Answer Correct Answer: A) Methane, ethane, propane, butane. 10. Which of the following compound is ether A) CH$_{3}$CHO. B) CH$_{3}$CH$_{2}$OCH$_{3}$. C) CH$_{3}$COCH$_{3}$. D) CH$_{3}$COOH. Show Answer Correct Answer: B) CH$_{3}$CH$_{2}$OCH$_{3}$. 11. Which of the following is most reactive towards nucleophilic substitution reaction?? A) C6H5Cl. B) CH2=CHCl. C) ClCH2CH=CH2. D) CH3CH=CHCl. Show Answer Correct Answer: C) ClCH2CH=CH2. 12. General formula for alkyne A) C$_{n}$H$_{2n+2}$. B) C$_{n}$H$_{2n}$. C) C$_{n}$H$_{2n-2}$. D) CH. Show Answer Correct Answer: C) C$_{n}$H$_{2n-2}$. 13. Which element is found in all organic molecules? A) Oxygen (O). B) Carbon (C). C) Hydrogen (H). D) Nitrogen (N). Show Answer Correct Answer: B) Carbon (C). 14. The position of Carbon in the periodic table is A) Period-2, Group-15. B) Period-1, Group-14. C) Period-2, Group-14. D) Period-1, Group-15. Show Answer Correct Answer: C) Period-2, Group-14. 15. Which of the following is the general formula for alkenes? A) C$_{n}$H$_{2n+2}$. B) C$_{n}$H$_{2n}$. C) C$_{2n}$H$_{n+2}$. D) C$_{2n}$H$_{n}$. Show Answer Correct Answer: B) C$_{n}$H$_{2n}$. 16. Colour change when Br$_{2}$ water is added to Butene A) Purple to brown. B) Purple to colourless. C) Orange to green. D) Orange to colourless. Show Answer Correct Answer: D) Orange to colourless. 17. An organic compound gave 0.4655g of CO$_{2}$ on complete combustion. If the mass of the compound taken was 0.2115g, what is the percentage of C in it? A) 60.03%. B) 26.67%. C) 28.08%. D) 13.30%. Show Answer Correct Answer: A) 60.03%. 18. Number of alcohol produces by reduction of ester? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 19. Amines condense with aldehydes to form ..... A) Schiff base. B) Amides. C) Acetamides. D) None of the above. Show Answer Correct Answer: A) Schiff base. 20. Which statement is correct about the polymerization of ethene to poly(ethene)? A) The polymer is an alkene. B) The monomer ethene and the repeating unit have the same empirical formula. C) The monomer ethene is less reactive than the polymer. D) The polymer contains C-C single and C=C double bonds. Show Answer Correct Answer: B) The monomer ethene and the repeating unit have the same empirical formula. 21. Which two elements do MOST organic compounds contain? A) Carbon and hydrogen. B) Carbon and oxygen. C) Oxygen and hydrogen. D) Carbon and nitrogen. Show Answer Correct Answer: A) Carbon and hydrogen. 22. Which is NOT a type of mechanism? A) Electrophilic addition. B) Nucleophilic substitution. C) Free radical substitution. D) Free radical addition. Show Answer Correct Answer: D) Free radical addition. 23. Which of the following statement is true about the stability of carbanions? A) The electron withdrawing groups like-NO$_{2}$, -CN, >C=O increases the stability of carbanions. B) The negatively charged carbon is sp$^{3}$ hybridised and pyramidal. C) Order of stability of carbanions is 3$^{0}$>2$^{0}$>1$^{0}$. D) Stability of carbanions increases with increase in s-character of orbital. Show Answer Correct Answer: C) Order of stability of carbanions is 3$^{0}$>2$^{0}$>1$^{0}$. 24. There are two main forms of isomerism, which are? A) Structural isomerism and Stereoisomerism. B) Stereoisomerism and Physical isomerism. C) Chemical isomerism and Stereoisomerism. D) Structural isomers and Geometric Isomers. Show Answer Correct Answer: A) Structural isomerism and Stereoisomerism. 25. Which of the following compounds turn blue litmus red? A) Methane. B) Ethene. C) Ethanoic acid. D) Ethanol. 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