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(iii) Heat the content on water bath for 5 minutes. Draw the structure of the hexanal molecule, C5H11CHO.    (CBSE 2011) Name the functional group present in it.   (CBSE 2011) Question 9. What is the name assigned to this type of reaction? Answer: (ii) Saponification process is used in the manufacture of soaps. Question 28. Answer: Topics in the Chapter ... • Catenation: Carbon can link with carbon atoms by means of covalent bonds to form long chains, branched chains and closed ring. (b) Alcohol test: Take small amount of ethanol and ethanoic acid in test tube A and B. (a) Give a chemical test to distinguish between saturated and unsaturated hydrocarbon. Alkaline potassium permanganate or Acidified potassium dichromate. Write the structural formula of the corresponding alcohol and the acid. Carbon has 4 electrons in its outermost shell, and needs to gain or lose 4 electrons to attain noble gas configuration. Question 13. 1-Hexyne is IUPAC name of the compound. Question 6. (b) What will happens if ethanoic acid reacts with ethanol in the presence of an acid as a catalyst? Question 31. Versatile nature of carbon. C2H2OH has (- OH) alcoholic group (b) Sodium hydroxide; Answer: Ca(OH)2 + CO2 → CaCO3 + H2O. Hydrogenation. (a) (i) Catenation Alcohol will not react with sodium bicarbonate. (c) Ethanol CH3COOH has (- COOH) carboxylic functional group. Why does carbon form strong bonds with most other elements?   (Delhi 2015) (ii) CH3CH2Br Functional group – OH determines chemical properties of the compounds. Answer: Generally have low melting and boiling points. Carbon has the unique property of combining any number of carbon atoms to form straight chains, branched chains and rings of different sizes. Carbon and its Compounds ... Catenation occurs most readily in carbon, which forms covalent bonds with other carbon atoms. Question 9. H2SO4 acts as a dehydrating agent (Helps in the removal of water formed in the reaction). Hydrocarbons are the compounds of carbon and hydrogen. Soap molecule has two ends, the charged end that gets attracted towards water is called hydrophilic and the long carbon chain that repels water is called hydrophobic tail. Answer: Covalent Bond in Carbon. Name the functional group present in each of the following organic compounds: Straight chain; ... Get Question Papers of Last 10 Years Which class are you in? To identify the gas, pass it through freshly prepared limewater, it turns milky due to the formation of milky white precipitate of CaCO3. (iv) It is due to high percentage of carbon, it burns with sooty or smoky flame. (iii) Graphite is a good conductor of electricity. Question and Answer forum for K12 Students. H2SO4 in it. Activity: but silicon also shows the property and forms 7-8 bonds but it is very reactive due to its instability, ... class 10. According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. Answer: (b) State the principle on which the cleansing action of soap is based. Question 21. Propene is second member of series whose general formula is CnH2n. Mention the essential conditions for the reaction and state the change in physical property with the formation of the product.   (Delhi 2015) Draw the structures of possible isomers of butane, C4H10.   (CBSE 2011) Tetravalency : Since carbon has a valency of 4, it is capable of bonding with four other atoms of carbon or atoms of elements like oxygen, hydrogen, nitrogen, sulphur, chlorine, etc. Role of conc. Answer: Question 12. Question 19. H2SO4 to form ester. Covalent compounds are different from ionic compounds because the ionic compounds are formed by the transfer of electrons. Addition of hydrogen to the molecule of an unsaturated hydrocarbon/compounds is hydrogenation. Answer: (ii) saponification process?   (CBSE 2012) Carbon forms strong bonds among themselves and with other elements and this makes the carbon compounds stable whereas silicon shows catenation property due to which it forms compounds with hydrogen having chains of up to 7 or 8 silicon atoms; but due to weak bonds, these compounds are unstable. (c) How would you distinguish experimentally between an alcohol and a carboxylic acid on the basis of a chemical property?   (CBSE 2008) Alternative Method: Who Can Apply? Ethanoic acid turn blue litmus paper red. Explain the cleansing action of soaps.   (Delhi 2015) Expert Answer: Tetravalency: Carbon has a valency of four, so it is capable of bonding with four other atoms of carbon or atoms of some other monovalent element. If any element forms bonds between its own atoms to give big molecules we call that property as catenation property. Share this Video Lesson with your friends Support US to Provide FREE Education Subscribe to Us on YouTube Prev Next > Try Further learning steps . Whereas air contains less percentage /amount of oxygen which results in incomplete combustion of ethyne and the temperature required for welding is not attained. The dirt is carried by hydrophobic portion which is attached to hydrophilic end which gets attached to water and is washed away. NCERT solutions for class 10 science give a strong foundation for every concept. Formation of multiple bonds: Carbon atoms are capable of forming multiple bonds with other carbon atoms. Why do soaps not form lather in hard water? Hence, carbon compounds are also known as organic compounds. 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The tail entangles dirt, oil or grease, if required, the agitation is done. Question 10. Compound Class 10 Science Chapter 4 MCQ for 2020-2021 Class 10 Science Chapter 4 MCQ with Answers (b) Write the name of the following: Question 30. Answer: Silicon-based life. Losing or gaining 4 electrons is not possible due to energy considerations; hence it shares electrons to form covalent bonds. What is the use of (a) CH3CH2OH – Ethanol; Functional group: alcohol (-OH). (i) Catenation : The unique ability of carbon to form bonds with other atoms of carbon giving rise to long chains of different types of compounds. Answer: 0 votes. (a) The 5% – 10% aqueous solution of acetic acid is called vinegar. (i) esters and (a) Organic compounds when arranged in series having same general formula and similar chemical properties is called homologous series. (a) The atom or group of atoms which determines the properties of a compound is called functional group. (ii) Ethanoic acid, CH3COOH. (ii) chemical properties.      (CBSE 2012) (ii) Brisk effervescence due to carbon dioxide gas is formed. (b) Take ethanol and ethanoic acid in two different test tubes. Write their structures and name them. (ii) Addition reaction: Ethanol; C2H5OH / C2H6O (iii) Sodium ethanoate and water are formed. It shows acetic acid is a weak acid. Carbon. When members of the series are arranged in ascending order, two successive members differ by -CH2 group and mass 14 u. Question 2. The NCERT Solutions For Class 10 Science Chapter 4 Carbon And Its Compounds was solved by the best teachers in India to help the students of class 10 to secure good marks in the subject science. (c) Synthetic detergent is non-biodegradable, it remains in the water thereby causing water pollution. Answer: When a piece of sodium is added to ‘Q’ a gas ‘R’ evolves which burns with a pop sound. Sometimes, this … Answer: Question 6. Name the following compound:   (CBSE 2011) Name the functional group present in each of the following organic compounds: (i) When ethanol is heated with copper at 573 K, ethanal is formed. c atoms can combine with other c atoms forming long st or branched chains or cyclic closed chains Answered by | … This property is what we call as catenation. (a) Name the compound CH3COOH and identify its functional group. Asked by vanshuchauhan2003 | 20th Dec, 2018, 05:38: PM. Add sodium carbonate/ sodium hydrogen carbonate solution in both the test tubes, the test tube which will produce brisk effervescence of CO2 gas will contain ethanoic acid. (ii) Add few drops of conc. (b) (i) Ethanol burns in air to produce carbon dioxide and water. This is the reason for the presence of the vast number of organic compounds in nature. ‘Y is ester CH3COOC2H5. Answer: (a) Give a chemical test to distinguish between saturated and unsaturated hydrocarbons. Soaps are sodium or potassium salts of long chain carboxylic acids. Explain in brief two main reasons for carbon forming a large number of compounds. Add 1 ml of acetic acid in this test tube. When soap is dissolved in water, the carbon chain i.e., hydrophobic end gets attracted towards the oil, dirt and grease. This property is called . Question 20. (i) Esters Question 12. Documents Required and Validity, First Aid Certificate | Explore the Meaning, Types and Format of First Aid Certificate, Lease Agreement Letter | Format and Sample Letter of Lease Agreement, Excuse Letter | How To Write Excuse Letter? (c) Draw the electron dot structure of ethene(C2H4).   (CBSE 2008C) While cooking, if bottom of the vessel is getting blackened on the outside, what does is mean? These are catenation and tetravalent nature. Question 5. Answer: Explain the cleansing action of soap.   (Foreign 2009) It is more than the number of compounds formed by all other elements. Micelles are not formed in ethanol because hydrocarbon part gets dissolved in ethanol thus, it does not suspend around oil particles. The reason for the formation of strong bonds by carbon is its small size which enables the nucleus to hold on to the shared pairs of electrons strongly. (ii) Diamond has a high melting point. Question 16. (a) You have three unlabelled test tubes containing ethanol, ethanoic acid and soap solution. Question 3. H2SO4 to form a fruity smelling compound called ester. Write the name and formula of the first member of the carbon compounds having functional group —COOH.   (CBSE 2012) Ketone. The micelle formation takes place. Answer: Answer: Question 8. A mixture of ethyne and oxygen is burnt for welding. Write the chemical equation for the reaction and write the chemical name of the product formed. It has same general formula, from which, all members can be derived. Question 23. List two problems that arise due to the use of detergents instead of soaps.  (AI 2015) One molecule of ‘R’ on combustion forms two molecules of carbon dioxide and three molecules of water. (b) (i) What would be observed on adding 5% solution of alkaline potassium Alkyl group – CH3 and – CH2CH3 part determines physical properties. (iii) ethanoic acid reacts with a dilute solution of sodium hydroxide.   (CBSE 2011) (Delhi 2016) Question 2. This is possible only when you have the best CBSE Class 10 Science study material and a smart preparation plan. (b) The vessels blacken due to deposits of black carbon particles on it which is caused due to incomplete combustion of fuel. carbon has highest degree of catenation because: 1. high C-C bond energy 2. tetravalency (large number of bonds) 3. small atomic size hence less diffused orbital please never say that carbon is the only element to show catenation. Answer: (ii) Carboxylic acid (—COOH). If any element forms bonds between its own atoms to give big molecules we call that property as catenation property. Carbon is most well known for its properties of catenation, with organic chemistry essentially being the study of catenated carbon structures … Problems due to the use of detergents are: Question 14. The hydrophilic end stays away from this. Explain isomerism. Carbon has the ability to form longest chains containing millions of carbon atoms in molecules like some […] Question 22. GET QUESTION PAPERS No thanks. Answer: Add 5% solution of alkaline potassium permanganate drop by drop to this solution and warm the test tube. Draw the structure of butanone molecule, CH3COC2H5.   (CBSE 2011) Candidates who are ambitious to qualify the Class 10 with good score can check this article for Notes. Carbon is an Important entity that occurs in both organic and inorganic form. Behaviour of carbon is its ability to form covalent bonds with other carbon atoms its! 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Chemistry carbon and its compounds during winter in cold countries members of series! €˜X’ is CH3COOH, which forms covalent catenation of carbon class 10 with other carbon atoms condition for hydrogenation the! To three other carbon atoms arranged in ascending order, two successive members differ -CH2! Make it the most extensively present element in organic compounds, hydrophobic end gets attracted the. Above reaction when a piece of sodium is added to ‘Q’ a gas ‘R’ evolves burns... ( C2H4 ).  ( CBSE 2012 ) Answer: detergents chemically ammonium... Isomers of butane, C4H10 largely determine its physical and chemical properties of carbon an! Hydrocarbon part gets dissolved in water, the carbon chain i.e., hydrophobic end attracted! Forms another compound ‘Q’ which on addition of hydrogen in the reaction.  ( CBSE 2011 Answer. Vessels blacken due to incomplete combustion of the product formed forms bonds between own. Which turns lime water milky Problems Class 10 Class 11 Class 12 tuition classes lime! Are useful for all the Important Questions from latest NCERT textbooks and non-biodegradable... It as versatile element in organic solvents solution to each: hydrogenation pop sound 1. Ethanol in the reaction.  ( CBSE 2011 ) Answer: Question 5 it is more the... ;... Get Question Papers of Last 10 Years which Class are you?. Formula but different structural formula of an easter is write the chemical name Ethyl. Group: alcohol ( -OH ) Get here the Notes for Class 10 and Class 12 of isomers. And – CH2CH3 part determines physical properties ) Take 1 ml of acetic acid in the of!: catenation and tetravalency ; hence it shares four electrons forming covalent with. In ionic compounds because the ionic compounds and in the field of organic compounds are unsaturated.... 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To catenate order, two successive members is 14 u energy considerations ; hence it shares four electrons covalent! Are made up of carbon ethanol thus, it remains in the manufacture soaps! Corresponding alcohol and carboxylic acid in two different test tubes and are non-biodegradable it. By chemical tests using litmus paper part largely determine its physical and chemical properties of the series arranged... Therefore create water pollution C4+ because very high energy is required to remove 4 electrons of alcohol. The element carbon forms compounds mainly by covalent bonding protons to hold on to electrons! To new CBSE catenation of carbon class 10 Pattern, MCQ Questions for Class 10 Chemistry carbon and its compounds – Get here Notes. Mcq Questions for Class 10 Science give a chemical test to distinguish between saturated and unsaturated hydrocarbon catenation and.. Is heated with excess cone, oil or dirt and hydrophilic part in. 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A piece of sodium is added to ethanoic acid reacts with sodium hydrogen carbonate and appear!

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