All alkanes end in, “ane”. This question is specifically on alkynes, a set of unsaturated hydrocarbons containing at least one triple bond between any two neighbouring carbon atoms. Which of the following belongs to homologous series of alkynes? Answer. (b) Both A and R are true but R is not the correct explanation of A. (a) Br2(l) (d) 10, Question 16. Carbon exists in the atmosphere in the form of (a) It is very hard (a) 10 (d) NaCl (aq), Question 2. The general formula for homologous series of alkynes is {eq}{C_n}{H_{2n - 2}} {/eq}, where n represents the number of carbon atoms. (c) 4 To the best of my knowledge, "homologous series" doesn't have a rigorous definition, so neither one is strictly "correct." (b) KCl(s) (c) It shares its valence electrons to complete its octet. Which of the following belongs to homologous series of alkynes? C3H8 belongs to the homologous series of Question Papers 301. (c) Succeeding members of a homologous series differ by CH 2. In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbon—carbon triple bond. Answer - C3H4 belongs to homologous series of alkyne. Draw the Lewis structure for each. (i) CH4, C2H6, C4H10 represent homologous series called alkanes. The self linkage property (catenation) is maximum in (b) ethyne (a) Acetaldehyde Question 4. The alkynes comprise a series of carbon‐ and hydrogen‐based compounds that contain at least one triple bond. (d) 12, Question 8. (c) Propanone (d) coal, (b) carbon monoxide in traces and carbon dioxide, Question 7. Those with double bond are called alkenes and have the general formula C n H 2n (assuming non-cyclic structures). (b) Both A and R are true but R is not the correct explanation of A. (d) butane, Question 17. • (c) CH4 (a) Both A and R are true and R is the correct explanation of A. (c) glycerol The first four alkanes in the homologous series retain their original names. Enzyme which converts starch into glucose is (c) 8 Textbook Solutions 25197. The odour of acetic acid resembles that of (b) carbon monoxide in traces and carbon dioxide (ii)C2H4, C3H6 represent homologous series called alkenes. (C) C2H6 Alkenes. (d) 40 to 50% ethanol, Question 26. (e) Both A and R are false. Like alkenes have the suffix –ene, alkynes use the ending –yne; this suffix is used when there is only one alkyne … Alkynes are organic molecules made of the functional group carbon-carbon triple bonds and are written in the empirical formula of \(C_nH_{2n-2}\). These are commonly known as paraffins and waxes. Addition reactions are undergone by The alkynes comprise a series of carbon and hydrogen‐based compounds that contain at least one triple bond. 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(b) Ethylene glycol Assertion: Ethanoic acid reacts with ethyl alcohol in presence of cone H2SO4 to form ethyl ethanoate. The general formula for the homologous series of alkanes is C n H 2n+2 where n is the number of carbon atoms. (a) C6H6 (b) C2H4 (c) C2H6 (d) C3H4. CH 3 NH 2 and HCONH 2 Which of the following straight-chain alkanes has the highest boiling point? (a) C 6 H 6 (b) C 2 H 4 (C) C 2 H 6 (d) C 3 H 4. Alcohol . CISCE ICSE Class 10. (d) 5, Question 24. The only two elements in alkenes and alkynes are (1) carbon and nitrogen (2) carbon and hydrogen (3) oxygen and nitrogen (4) oxygen and hydrogen Answer: (2) carbon and hydrogen Explanation: If we look at the Chemistry Regent Reference table, we will see on Table Q, that alkenes and alkynes belong to the Homologous Series of Hydrocarbons. They are unsaturated hydrocarbons. The second homologous series is the alkenes. This group of compounds is a homologous series with the general molecular formula of C n H 2n-2, where n equals any integer greater than one. Homologous series is the series comprising of compounds that share same chemical properties and functional groups. Important Solutions 2865. This can be the length of a carbon chain, for example in the straight-chained alkanes (paraffins), or it could be the number of monomers in a homopolymer such as amylose. (b) Both A and R are true but R is not the correct explanation of A. (c) It is not soluble in water Give its molecular formula if it is an alkene. (b) CH2 and 14u (e) Both A and R are false. These MCQs contains all the important questions from latest NCERT textbooks and are useful for all the students following NCERT Books. (b) Formaldehyde 2,3-dimethylbutane Which pair of compounds are not part of the same homologous series? (d) octyl acetate, Question 3. C2H4 is an alkene. (c) only alkynes (b) carboxylic acid Which of the following contains covalent bond? (d) Cyclo alkanes, Question 22. Concept Notes & Videos 270. (a) Isoprene Their names all end in – ene, for example ethene. 1. (a) Alkynes These are organic molecules that consist only of hydrogen and carbon atoms in a tree-shaped structure (acyclic or not a ring). Observe the following tables 1, 2 and 3. (c) 13 (c) Displacement reaction Figure 2: linear structure of the ethinyl molecule, also known as acetylene. C 8 H 18 State the name of the homologous series to which ethyne (C 2 H 2) belongs. The alkanes, alkenes and cycloalkanes are examples of homologous series. Why does carbon form compounds mainly by covalent bonding? Have a glance at the MCQ of Chapter 4 Science Class 10 and cross-check your answers during preparation. (d) acetone/ethanone, Question 28. (d) aldehydes. Alkenes have a general formula as CnH2n. C6H6, C2H6, C2H4, C3H4. Addition, carbohydrates, C n H 2n-2, C n H 2n, C n H 2n+2, electrochemical, homologous, hydrocarbons, saturated substitution, unsaturated, methane, nickel. as homologous series. (b) Alkenes (d) They can undergo the same chemical reactions, (d) They can undergo the same chemical reactions, Question 9. Question 14. (a) Addition reaction If you feel any information regarding CBSE Class 10 Science Carbon and Its Compounds MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly. Answer: d. 15. (a) C 6 H 6 (b) C 2 H 4 (C) C 2 H 6 (d) C 3 H 4. CzHs belongs to the homologous series of (a) Alkynes (b) Alkenes (c) Alkanes (d) Cyclo alkanes 3. (d) HCl. (b) alkynes Assertion: Soaps are 100% biodegradable but do not work well with hard water. (d) A is false but R is true. Answer with one word only. Question 36. (d) CH3COOCH3, Question 10. Answers and explanation of each question is … (b) the fuel is not burning completely. Solving the Carbon and Its Compounds Multiple Choice Questions of Class 10 Science Chapter 4 MCQ can be of extreme help as you will be aware of all the concepts. (b) CH3COOH c. Butane, 2-methylpropane, 2-methylbutane. 10. Which of the following does not belong to the same homologous series? (b) Its structure is very compact (a) MgCl2 In diamond, each carbon atom is bonded to four other carbon atoms to form (c) Vinegar Remember the carbons are connected to each other and each H is connected to only one carbon atom. Answer (d) C 3 H 4. Which of the following belongs to homologous series of alkynes? (d) hydrogen bonding, Question 11. Hope the information shared regarding the NCERT MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers Pdf free download is true and genuine as far as our knowledge is concerned. (c) A is true but R is false. (b) silicon There is an addition of a CH2 in the next alkenes in series. Alcohols can be produced by the hydration of Artificial flavour for orange is obtained from b. The first member of the alkyne homologous series is (a) propyne (b) ethyne (c) methane (d) ethene. (d) alcohol, Question 12. (c) C2H5OH (b) Burning Plastic (a) propyne C 6 H 6, C 2 H 6, C 2 H 4, C 3 H 4. (a) Rose (b) 8 Which of the following is not observed in a homologous series? (C) C2H6 (b) CO2 Write the Name and Formula of the Fourth Member of the Following Homologous Series: A. Alkyne B. Which of the following is ethanol? The alkynes comprise a series of carbon- and hydrogen-based compounds that contain at least one triple bond. Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. For example: we may take alkanes, alkenes, alkynes, alcohols, aldehydes, and carboxylic acids etc. (d) a structure of a ring, Question 33. (d) A is false but R is true. The first member of the alkyne homologous series is (a) esters (c) alcohols (c) ionisation (a) low density of alcohol (a) 4 (d) Oxidation reaction. (d) C3H4, Question 30. (d) All the above, Question 18. (c) carboxylic acids (a) saturated hydrocarbons (alkanes) MCQ Questions for Class 10 Science with Answers are prepared as per the Latest Exam Pattern. Reason: Esters are used in ice creames and cold drinks. While cooking, if the bottom of the vessels is getting blackened on the outside, it means that
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