{"id":3145,"date":"2026-06-22T10:39:23","date_gmt":"2026-06-22T05:09:23","guid":{"rendered":"https:\/\/mymockmate.com\/notes\/?p=3145"},"modified":"2026-06-22T10:39:27","modified_gmt":"2026-06-22T05:09:27","slug":"ncert-class-10-science-chapter-4-exercise-solutions-carbon-and-its-compounds","status":"publish","type":"post","link":"https:\/\/mymockmate.com\/notes\/ncert-class-10-science-chapter-4-exercise-solutions-carbon-and-its-compounds\/","title":{"rendered":"NCERT Class 10 Science Chapter 4 Exercise Solutions | Carbon and Its Compounds"},"content":{"rendered":"<div class=\"mymoc-top mymoc-entity-placement\" id=\"mymoc-3232610697\"><div id=\"mymoc-1087787695\"><a href=\"https:\/\/amzn.to\/4v5gV6P\" aria-label=\"calculators\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators.png 1302w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-300x99.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-1024x338.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-768x254.png 768w\" sizes=\"(max-width: 1302px) 100vw, 1302px\" width=\"1302\" height=\"430\"><\/a><\/div><\/div><div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-bottom-right\"><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/3145?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\"><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Print<\/span><\/a> <span class=\"pdfprnt-count-generation\">2<\/span><\/div>\n<h1 class=\"wp-block-heading\">Short Introduction<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Carbon is one of the most important elements in nature. It forms millions of compounds due to its tetravalency and catenation properties. This chapter explains covalent bonding, hydrocarbons, functional groups, ethanol, ethanoic acid, soaps, detergents, and the versatile nature of carbon. These NCERT Exercise Solutions provide detailed step-by-step answers for better understanding and exam preparation.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Quick Information Box<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Particular<\/th><th>Details<\/th><\/tr><tr><td>Chapter Name<\/td><td>Carbon and Its Compounds<\/td><\/tr><tr><td>Class<\/td><td>10<\/td><\/tr><tr><td>Subject<\/td><td>Science<\/td><\/tr><tr><td>Board<\/td><td>CBSE\/NCERT<\/td><\/tr><tr><td>Chapter Number<\/td><td>4<\/td><\/tr><tr><td>Main Topics<\/td><td>Covalent Bonding, Hydrocarbons, Functional Groups, Ethanol, Ethanoic Acid, Soaps &amp; Detergents<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">Concepts Used (Topics Covered)<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Covalent Bond Formation<\/li>\n\n\n\n<li>Tetravalency of Carbon<\/li>\n\n\n\n<li>Catenation<\/li>\n\n\n\n<li>Saturated and Unsaturated Hydrocarbons<\/li>\n\n\n\n<li>Homologous Series<\/li>\n\n\n\n<li>Functional Groups<\/li>\n\n\n\n<li>Ethanol and Ethanoic Acid<\/li>\n\n\n\n<li>Hydrogenation<\/li>\n\n\n\n<li>Soap and Detergent Action<\/li>\n\n\n\n<li>Micelle Formation<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Important Formulas<\/h1>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Ethane = C&#8322;H&#8326;<\/li>\n\n\n\n<li>Ethene = C&#8322;H&#8324;<\/li>\n\n\n\n<li>Ethyne = C&#8322;H&#8322;<\/li>\n\n\n\n<li>Ethanol = C&#8322;H&#8325;OH<\/li>\n\n\n\n<li>Ethanoic Acid = CH&#8323;COOH<\/li>\n\n\n\n<li>Hydrogenation:<br>Unsaturated Hydrocarbon + H&#8322; &rarr; Saturated Hydrocarbon<\/li>\n\n\n\n<li>Neutralization:<br>CH&#8323;COOH + NaOH &rarr; CH&#8323;COONa + H&#8322;O<\/li>\n<\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">NCERT Exercise Questions &amp; Step-by-Step Solutions<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Question 1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ethane (C&#8322;H&#8326;) has:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(a) 6 covalent bonds<br>(b) 7 covalent bonds<br>(c) 8 covalent bonds<br>(d) 9 covalent bonds<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Structure of Ethane:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H&#8323;C&mdash;CH&#8323;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bonds:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>6 C-H bonds<\/li>\n\n\n\n<li>1 C-C bond<\/li>\n<\/ul>\n\n\n\n<div class=\"internal-linking-related-contents\"><a href=\"https:\/\/mymockmate.com\/notes\/ncert-class-10-maths-real-number-exercise-1-2-solutions-mymockmate\/\" class=\"template-2\"><span class=\"cta\">Related Topic to Read more<\/span><span class=\"postTitle\">NCERT Class 10 Maths Real Number Exercise 1.2 Solutions |  MyMockMate<\/span><\/a><\/div><p class=\"wp-block-paragraph\">Total = 7 covalent bonds<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>(b) 7 covalent bonds<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 2<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Butanone is a four-carbon compound with the functional group:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The suffix &ldquo;one&rdquo; indicates a ketone functional group.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>(c) Ketone<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Blackening of vessel bottom indicates:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<div class=\"internal-linking-related-contents\"><a href=\"https:\/\/mymockmate.com\/notes\/class-10-maths-exercise-2-1-solutions-polynomials-ncert-solutions\/\" class=\"template-2\"><span class=\"cta\">Related Topic to Read more<\/span><span class=\"postTitle\">NCERT Class 10 Maths Exercise 2.1 Solutions | Polynomials<\/span><\/a><\/div><p class=\"wp-block-paragraph\">Black soot forms due to incomplete combustion of fuel.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>(b) The fuel is not burning completely<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Explain the nature of covalent bond using CH&#8323;Cl.<\/p><div class=\"mymoc-middle mymoc-entity-placement\" id=\"mymoc-2839664805\"><div id=\"mymoc-828911598\"><a href=\"https:\/\/amzn.to\/3S4CntS\" aria-label=\"Stationeries\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/Stationeries.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/Stationeries.png 1303w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/Stationeries-300x89.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/Stationeries-1024x304.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/Stationeries-768x228.png 768w\" sizes=\"(max-width: 1303px) 100vw, 1303px\" width=\"1080\" height=\"100\"><\/a><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Carbon shares four electrons.<\/li>\n\n\n\n<li>Three electrons are shared with hydrogen atoms.<\/li>\n\n\n\n<li>One electron is shared with chlorine atom.<\/li>\n\n\n\n<li>Shared electrons form covalent bonds.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Thus:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>3 C-H covalent bonds<\/li>\n\n\n\n<li>1 C-Cl covalent bond<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">CH&#8323;Cl is formed by sharing of electrons, hence it contains covalent bonds.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 5(a)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Draw electron dot structure of ethanoic acid.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<div class=\"internal-linking-related-contents\"><a href=\"https:\/\/mymockmate.com\/notes\/class-10-maths-exercise-2-2-solutions-relationship-between-zeroes-and-coefficients\/\" class=\"template-2\"><span class=\"cta\">Related Topic to Read more<\/span><span class=\"postTitle\">Class 10 Maths Exercise 2.2 Solutions | Relationship Between Zeroes and Coefficients<\/span><\/a><\/div><p class=\"wp-block-paragraph\">H&#8323;C&mdash;C(=O)&mdash;OH<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Carbon shares electrons with oxygen and hydrogen atoms to complete octet.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 5(b)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Draw electron dot structure of H&#8322;S.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H : S : H<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sulphur shares one electron each with two hydrogen atoms.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 5(c)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Draw electron dot structure of propanone.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">CH&#8323;&mdash;CO&mdash;CH&#8323;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The oxygen atom forms a double bond with the central carbon atom.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 5(d)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Draw electron dot structure of F&#8322;.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">&mdash;F:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Each fluorine atom shares one electron pair.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">What is a homologous series?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A series of organic compounds having:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Same functional group<\/li>\n\n\n\n<li>Similar chemical properties<\/li>\n\n\n\n<li>Successive members differing by CH&#8322; unit<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Example<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Methane &rarr; CH&#8324;<br>Ethane &rarr; C&#8322;H&#8326;<br>Propane &rarr; C&#8323;H&#8328;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Difference between successive members = CH&#8322;<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 7<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Differentiate between ethanol and ethanoic acid.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Property<\/td><td>Ethanol<\/td><td>Ethanoic Acid<\/td><\/tr><tr><td>Smell<\/td><td>Pleasant<\/td><td>Vinegar smell<\/td><\/tr><tr><td>Litmus Test<\/td><td>No change<\/td><td>Turns blue litmus red<\/td><\/tr><tr><td>Reaction with NaHCO&#8323;<\/td><td>No reaction<\/td><td>Produces CO&#8322; gas<\/td><\/tr><tr><td>Nature<\/td><td>Neutral<\/td><td>Acidic<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 8<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Why does micelle formation take place?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Soap molecules have:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hydrophilic head<\/li>\n\n\n\n<li>Hydrophobic tail<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The tails trap oil and grease while heads remain in water. Thus micelles are formed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Micelles are not formed in ethanol because soap dissolves completely in ethanol.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Why are carbon compounds used as fuels?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Carbon compounds:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Burn easily<\/li>\n\n\n\n<li>Produce large amount of heat<\/li>\n\n\n\n<li>Have high calorific value<\/li>\n\n\n\n<li>Are readily available<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Hence they are widely used as fuels.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 10<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Explain scum formation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hard water contains calcium and magnesium salts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These react with soap:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Soap + Ca&sup2;&#8314;\/Mg&sup2;&#8314; &rarr; Insoluble precipitate<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The insoluble precipitate is called scum.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 11<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">What change is observed with litmus paper?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Soap solution is basic.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Red litmus turns blue.<\/li>\n\n\n\n<li>Blue litmus remains blue.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 12<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">What is hydrogenation? Give industrial application.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hydrogenation is the addition of hydrogen to unsaturated compounds in presence of nickel catalyst.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vegetable Oil + H&#8322; &rarr; Vanaspati Ghee<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Industrial Application<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Manufacture of vanaspati ghee from vegetable oils.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 13<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Which hydrocarbons undergo addition reactions?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Given:<br>C&#8322;H&#8326;, C&#8323;H&#8328;, C&#8323;H&#8326;, C&#8322;H&#8322;, CH&#8324;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Addition reactions occur in unsaturated hydrocarbons.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unsaturated compounds:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C&#8323;H&#8326; (alkene)<\/li>\n\n\n\n<li>C&#8322;H&#8322; (alkyne)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C&#8323;H&#8326; and C&#8322;H&#8322;<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 14<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Differentiate between saturated and unsaturated hydrocarbons.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Add bromine water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Observation:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unsaturated hydrocarbons decolourize bromine water.<\/li>\n\n\n\n<li>Saturated hydrocarbons do not.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This test differentiates them.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">Question 15<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Explain cleaning action of soap.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Solution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Step 1:<br>Soap molecules contain hydrophilic heads and hydrophobic tails.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Step 2:<br>Hydrophobic tails surround grease and dirt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Step 3:<br>Micelles are formed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Step 4:<br>Dirt gets trapped inside micelles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Step 5:<br>During washing, dirt is removed along with water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hence soap cleans clothes effectively.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Common Mistakes<\/h1>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Confusing ketone with aldehyde.<\/li>\n\n\n\n<li>Forgetting CH&#8322; difference in homologous series.<\/li>\n\n\n\n<li>Writing ethanol as acidic.<\/li>\n\n\n\n<li>Assuming soap works equally well in hard water.<\/li>\n\n\n\n<li>Ignoring the role of catalyst in hydrogenation.<\/li>\n<\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">Exam Tips<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Learn all functional groups carefully.<\/li>\n\n\n\n<li>Remember definitions of catenation and tetravalency.<\/li>\n\n\n\n<li>Practice electron-dot structures.<\/li>\n\n\n\n<li>Revise reactions of ethanol and ethanoic acid.<\/li>\n\n\n\n<li>Frequently asked question: Micelle formation and cleaning action of soap.<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Practice MCQs<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">1. Carbon forms four covalent bonds because of:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Monovalency<br>B. Divalency<br>C. Trivalency<br>D. Tetravalency<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer: D<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Vinegar contains:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Methanoic acid<br>B. Ethanoic acid<br>C. Sulphuric acid<br>D. Hydrochloric acid<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer: B<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Functional group of alcohol is:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. -CHO<br>B. -COOH<br>C. -OH<br>D. &gt;C=O<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer: C<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Soap molecules form:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Crystals<br>B. Micelles<br>C. Salts<br>D. Gases<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer: B<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Unsaturated hydrocarbons contain:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Single bond only<br>B. Double\/Triple bond<br>C. Ionic bond<br>D. Metallic bond<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer: B<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">FAQ Section<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Q1. Why is carbon called a versatile element?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Because it shows tetravalency and catenation, forming millions of compounds.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q2. What is catenation?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The ability of carbon atoms to form long chains with one another.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q3. What is the functional group of ethanol?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hydroxyl group (-OH).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q4. Why does soap not work well in hard water?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Soap forms insoluble scum with calcium and magnesium ions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q5. What is the common name of ethanoic acid?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Acetic acid.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">CTA (Call To Action)<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Found these NCERT Class 10 Science Chapter 4 solutions helpful?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Explore more chapter-wise NCERT solutions, MCQs, important questions, notes, and board exam preparation material on <a href=\"http:\/\/www.mymockmate.com\"><strong>www.mymockmate.com<\/strong><\/a> for complete exam success.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-bottom-right\"><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/3145?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\"><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Print<\/span><\/a> <span class=\"pdfprnt-count-generation\">2<\/span><\/div>\n    <div class=\"xs_social_share_widget xs_share_url after_content \t\tmain_content  wslu-style-1 wslu-share-box-shaped wslu-fill-colored wslu-none wslu-share-horizontal wslu-theme-font-no wslu-main_content\">\n\n\t\t\n        <ul>\n\t\t\t        <\/ul>\n    <\/div> \n<div class=\"mymoc-bottom mymoc-entity-placement\" id=\"mymoc-3742497566\"><div id=\"mymoc-4213660903\"><a href=\"https:\/\/amzn.to\/43YYZi3\" aria-label=\"smart-phones\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/smart-phones.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/smart-phones.png 1303w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/smart-phones-300x76.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/smart-phones-1024x259.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/smart-phones-768x194.png 768w\" sizes=\"(max-width: 1303px) 100vw, 1303px\" width=\"1303\" height=\"329\"><\/a><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p> 2 Short Introduction Carbon is one of the most important elements in nature. It forms millions of<\/p>\n","protected":false},"author":2,"featured_media":3146,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""},"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5,13],"tags":[2364,2365,2368,2370,1382,2371,2366,2367,2369],"class_list":["post-3145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-class-10","category-science-class-10","tag-carbon-and-its-compounds","tag-carbon-compounds","tag-chapter-4-solutions","tag-class-10-chemistry","tag-covalent-bond","tag-ethanol-and-ethanoic-acid","tag-ncert-class-10-science","tag-ncert-exercise-answers","tag-soap-and-detergent"],"featured_image_src":"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/NCERT-Class-10-Science-Carbon-and-Its-Compounds-Chapter-4-Solutions-Class-10-Chemistry-NCERT-Exercise-Answers-Carbon-Compounds-Covalent-Bond-Ethanol-and-Ethanoic-Acid.png","author_info":{"display_name":"Team Mymockmate (M)","author_link":"https:\/\/mymockmate.com\/notes\/author\/madhusa\/"},"jetpack_publicize_connections":[],"_links":{"self":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/3145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/comments?post=3145"}],"version-history":[{"count":1,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/3145\/revisions"}],"predecessor-version":[{"id":3147,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/3145\/revisions\/3147"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/media\/3146"}],"wp:attachment":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/media?parent=3145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/categories?post=3145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/tags?post=3145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}