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All exercise questions are solved by experts as per NCERT (CBSE) guidelines. (ii) 1 g Na (s) (a) 2,2-Dimethylpentane or 2-Dimethylpentane, (b) 2,4,7-Trimethyloctane or 2,5,7-Trimethyloctane, (c) 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane. (b) Fill in the blanks in the following conversions: Question 1.17 A sample of drinking water was found to be severely contaminated with chloroform, bonds, four C–H sigma (??−?) Organic Chemistry-Some Basic Principles(Q & A) 13. aqueous hydrochloric acid according to the reaction Draw formulas for the first five members of each homologous series beginning with the following compounds, The first five members of each homologous series beginning with the given compounds are. This method is used to separate non-volatile liquids from volatile impurities. (iv) 126,000 NCERT Solutions for Class 11 Science Chemistry Chapter 1 Some Basic Concepts Of Chemistry are provided here with simple step-by-step explanations. What is the relationship between the members of following pairs of structures ? 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NCERT Books Class 11 Chemistry: The National Council of Educational Research and Training (NCERT) publishes Chemistry textbooks for Class 11. Chapter Wise Important Questions Class 11 Chemistry. Question 1.13 Pressure is determined as force per unit area of the surface. (a) Which law of chemical combination is obeyed by the above experimental data? This is continued till we get an almost saturated solution. (iv) 500.0 Ex: Carbonyl groups, CH3CH2+(Carbocations), Neutral molecules( due to the presence of a lone pair). If its equivalent weight is 8.9, the exact atomic weight of element would be (a) 26.89 (b) 8.9 (c) 17.8 (d) 26.7. Thus, the correct IUPAC name would be 2,4,7-Trimethyloctane. bonds, six C–H sigma (??−?) Question 1.33 Calculate the number of atoms in each of the following bond, and one C=O pi (??−?) Molar mass of sodium acetate is 82.0245 g mol–1. of it in oxygen gives 3.38 g carbon dioxide , 0.690 g of water and no other products. A carbocation is formed as the reaction intermediate. 0.375 molar aqueous solution. Answer. Here, 2,4,7 is lower than 2,5,7. Question 1.18 Express the following in the scientific notation: --Every substance has unique or characteristic properties. All the 6 carbon atoms in benzene are sp2 hybridised. Isotope Isotopic molar mass Abundance (iii) CH4. It comes under heterolytic cleavage since the shared remains with one of the fragments. Chapter 12 - Organic Chemistry Some Basic Principles and Techniques 12.1 General Introduction. Question How is it defined? This stabilizes the compound whereas the ethyl group belongs to the electron-releasing group and shows +I effect. Question (b) CH3CH2COOH > (CH3)2 CHCOOH > (CH3)3C.COOH. Answer Mass percent of 69% means tat 100g of nitric acid solution contain 69 g of nitric acid by mass. bonds in the given compound. CBSE Syllabus Class 12 Maths Physics Chemistry ... CBSE Syllabus Class 11 Mathematics biology chemistry ... CBSE Syllabus Class 10 Maths Science Hindi English ... CBSE Syllabus Class 9 Mathematics Science English Hindi ... Revised Syllabus for Class 12 Mathematics. This mixture is placed on chromatogram where the component which is less absorbed by the chromatogram moves faster up the paper than the other component which is almost stationary. bond, one N–H sigma(??−?) (ii) CO2 The aniline is left behind in the round bottom flask. Identify reactive intermediate produced as free radical, carbocation and carbanion. CHCl3, supposed to be carcinogenic in nature. With the help of these solutions for Class 11 Chemistry Chapter 12 Organic Chemistry Some Basic Principles and Techniques, we can prepare easily for the exams effectively. Explain why alkyl groups act as electron donors when attached to a π system. (iii) 100 atoms of A + 100 molecules of B A nucleophile is a reagent that has an electron pair and is willing to donate it. Question 1.15 Match the following prefixes with their multiples: Question 1.1 Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 (iii) 2 moles of carbon are burnt in 16 g of dioxygen. (Na2SO4). NCERT books are one of the best study materials for students studying in Class 11. There are two C – Cl sigma (? Students will be able to name the compounds according to the IUPAC system of nomenclature and also derive their structures from the given names. 1Pa = 1N m–2 Question 1.23 In a reaction bonds, and two C=C pi(??−?) Hydrocarbons(Q & A) 14. Mass of dinitrogen Mass of dioxygen has a density, 1.41 g mL–1 and the mass per cent of nitric acid in it being 69%. enough water to make a final volume up to 2L? Principle: The principle on which it works is the difference in the solubility of the compound and impurities in a given solvent. (i) Number of moles of carbon atoms. CH2=C=O, CH3CH=CH2, (CH3)2CO, CH2=CHCN, C6H6. Question 1.31 How many significant figures should be present in the answer of the following These notes are prepared keeping in mind the level of preparation needed by the students to prepare for Class 11 exams. Burning a small sample Draw the resonance structures for the following compounds. 0.5 (a)The prefix di shows that there are two methyl groups in the chain. Question 1.16 What do you mean by significant figures ? Question 1.30 What will be the mass of one 12C atom in g ? (i) 300 atoms of A + 200 molecules of B (i) 14 g 16 g These ncert book chapter wise questions and answers are very helpful for CBSE board exam. Exercise well for Chemistry class 11 chapter 14 Some Basic Concepts Of Chemistry with explanatory concept video solutions. (iii) 1 g Li (s) (iii) 0.04597 1.6. The chapter touches upon topics such as the importance of chemistry, atomic mass, and molecular mass. For the following bond cleavages, use curved-arrows to show the electron flow and classify each as homolysis or heterolysis. 38Ar 37.96272 g mol–1 0.063% Question 1.26 If ten volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how The types of … (i) 1 km = ...................... mm = ...................... pm Class XI Chapter 1 – Some Basic Concepts of Chemistry Chemistry Some Basic Concepts of Chemistry - Chemistry Notes, Questions and Answers, Free Study Material, Chapter wise Online Tests. Free NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry solved by expert teachers from latest edition books and as per NCERT (CBSE) guidelines.Class 11 Chemistry Some basic Concepts of Chemistry NCERT Solutions and Extra Questions with Solutions to help you to revise complete Syllabus and Score More marks. bond, one N–O sigma(??−?) NCERT Class 11 chemistry book is designed in such a way that students who want to appear for JEE Mains examination after Class 12 can also go through it. “Some Basic Concepts of Chemistry” is the first chapter in the Class 11 Chemistry syllabus as prescribed by NCERT. Question (ii) 1 mole of carbon is burnt in 16 g of dioxygen. Free PDF download of NCERT Solutions for Class 11 Chemistry Chapter 1 - Some Basic Concepts of Chemistry solved by Expert Teachers as per NCERT (CBSE) textbook guidelines. bonds, one C–N sigma (??−?) Class 11 Chemistry Notes for Organic Chemistry Some Basic Principles and Techniques – Get here the Notes, Question & Practice Paper of Class 11 Chemistry for topic Organic Chemistry Some Basic Principles and Techniques. These compounds differ in the position of the ketone group. Question 1.8 Determine the molecular formula of an oxide of iron in which the mass per cent (ii) 10.4107 A carbanion is formed as the reaction intermediate. – E effect: Occurs when electrons are moved away from the attacking agent, + E effect: Occurs when electrons are moved towards the attacking agent. many volumes of water vapour would be produced? (iii) 28 g 32 g Ex: Chromatography can be used to separate a mixture of blue and red ink. (b)The locant number should start from the minimum. (a) Hydroxyl (–OH), Aldehyde (–CHO), Methoxy (–OMe), (b)Ketone (C = O),Amino (–NH2),Diethylamine (N(C2H5)2 ). CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Inductive effect involves the permanent displacement of sigma (σ) electrons along a saturated chain, whenever an electron withdrawing or electron donating group is present. bond in the given compound. Mass and Stoichiometry ,Some Basic Concepts of Chemistry - Get topics notes, Online test, Video lectures, Doubts and Solutions for CBSE Class 11-science on TopperLearning. 2.00 ns. ?−?l) bonds and two C–H sigma (??−?) There are two C–C sigma (??−?) It is a nucleophile since HO- is electron rich in nature. (v)2.5 mol A + 5 mol B. (iv) 1 g of Cl2(g). The SI unit of (i) 1 g Au (s) It is also known as a nucleus-loving reagent. Identify the reagents shown in bold in the following equations as nucleophiles or electrophiles: (a) CH3COOH + HO–→\rightarrow→ CH3COO– + H2O, (b) CH3COCH3+ C–N →\rightarrow→ (CH3)2C(CN) + (OH)–, (c) C6H5 + CH3C+O →\rightarrow→ C6H5COCH3. 0.02856 29 (i) 1 mole of carbon is burnt in air. (iii) 0.0125 + 0.7864 + 0.0215, Question 1.32 Use the data given in the following table to calculate the molar mass of naturally of ethanol is 0.040. × Give its statement. Your email address will not be published. There are three C–H sigma (??−?) Question 1.34 A welding fuel gas contains carbon and hydrogen only. Principle: The principle on which it works is that liquids having different boiling points vaporise at different temperatures. (i) 0.0025 The overlap as shown above results in delocalization making the compounds more stable. Chapterwise NCERT Solutions for Class 11 Chemistry NCERT Solutions for Class 11 Chemistry Chapter 1 – Some Basic Concepts of Chemistry . The crystals are then separated and dried. (c) Elimination reaction since reaction hydrogen and bromine are removed to form ethene. e.g. (b) Addition reaction since two reactant molecules combines to form a single product. (iv) 5 mol A + 2.5 mol B NCERT Solutions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry includes all the important topics with detailed explanation that aims to help students to understand the concepts better. The acidity increases with the increase in +I effect which is directly proportional to the number of alkyl groups. bonds, and three C=C pi (??−?) What are electrophiles and nucleophiles? Classify the following reactions in one of the reaction type studied in this unit. 1.11 What is the concentration of sugar (C12H22O11) in mol L–1 if its 20 g are dissolved in 1.14 What is the SI unit of mass? If you have any query regarding Kerala Plus One Chemistry Chapter Wise Questions and Answers Chapter 1 Some Basic Concepts of Chemistry, drop a comment below and we will get back to you at the earliest. (i) 0.0048 E.g. to the following chemical equation: bond in the given compound. (iii) 8008 It is also used when the components have a considerable difference in their boiling points. Please send your queries to ncerthelp@gmail.com you can aslo visit our facebook page to get quick help. Thus, the correct IUPAC name would be 2-Chloro-4-methylpentane. (i) After reading this subject students will understand the reasons for the tetravalence of carbon and shapes of organic molecules. What mass of CaCO3 is required to react completely with 25 mL of 0.75 M HCl? Ex: NC–, OH–, R3C– (carbanions) etc. There are six C – C sigma (??−?) Identify the limiting reagent, if any, in the following reaction mixtures. Question 1.25 How are 0.50 mol Na2CO3 and 0.50 M Na2CO3 different? (v) 500.0 Question 1.36 Chlorine is prepared in the laboratory by treating manganese dioxide (MnO2) with It comes under homolytic cleavage since one of the shared pair in a covalent bond goes with the bonded atom. Hence, I would expect O2NCH2CH2O–to be more stable than CH3CH2O–. (ii) Will any of the two reactants remain unreacted? The alkyl is attached directly to an unsaturated system. MCQs of chemistry class 11 chapter 1 Somebasic concepts of chemistry, useful for CBSE, NEET, IIT JEE and CET exam preparation, find more@learnfatafat CBSE 11 Chemistry 01 Some Basic Concepts of Chemistry Which of the two: O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why? (d)Out of the two functional groups present in the given compound, the alcoholic group is the principal functional group. The NCERT Chemistry Books are based on the latest exam pattern and CBSE syllabus. Give condensed and bond line structural formulas and identify the functional group(s) present, if any, for : (b)2-Hydroxy-1,2,3-propanetricarboxylic acid, (b) 2–hydroxy–1, 2, 3–propanetricarboxylic acid, Carboxylic acid(-COOH) and Alcoholic (-OH) groups. Dec 25,2020 - MCQs Of Some Basic Concepts Of Chemistry, Past Year Questions JEE Mains, Class 11, Chemistry | 17 Questions MCQ Test has questions of JEE preparation. Question 1. N2 (g) + H2 (g) → 2NH3 (g) All the solutions of Some Basic Concepts of Chemistry - Chemistry explained in detail by experts to help students prepare for their CBSE exams. Explain with examples. Free NCERT Solutions for Class 11 Chemistry Chapter 2 Structure of Atom solved by expert teachers from latest edition books and as per NCERT (CBSE) guidelines.Class 11 Chemistry Structure of Atom NCERT Solutions and Extra Questions with Solutions to help you to … Explain the terms Inductive and Electromeric effects. Give the IUPAC names of the following compounds: Which of the following represents the correct IUPAC name for the compounds concerned? Due to hyperconjugation, an alkyl group behaves as an electron-donor group when attached to a π system. Classification of Elements and Periodicity in Properties: 4. (b) CH3CH2COOH > (CH3)2CHCOOH > (CH3)3C.COOH. For example, look at propene. It comes under heterolytic cleavage since the shared remains with the carbon atom of propanone. 1.12 If the density of methanol is 0.793 kg L–1, what is its volume needed for making It is a nucleophile since C–N is electron rich in nature. bonds in the given compound. Get NCERT Solutions for class 11 Chemistry, chapter 14 Some Basic Concepts Of Chemistry in video format & text solutions. 40Ar 39.9624 g mol–1 99.600%. Question 1.29 Calculate the molarity of a solution of ethanol in water in which the mole fraction All Chapter 1 - Some Basic Concepts of Chemistry Exercises Questions with Solutions to help you to revise complete Syllabus and boost your score more in examinations. Indicate the σ and π bonds in the following molecules: C6H6, C6H12, CH2Cl2, CH2 = C = CH2, CH3NO2, HCONHCH3. When the force with which an atom attracts electrons towards itself is greater than that of hydrogen, it is said to exhibit +I effect. The sigma electrons of the C-H bond get delocalized due to hyperconjugation. bond, and one N=O pi (??−?) These properties can be classified into twocategories – physical properties and chemical properties.Physical properties are those properties which can be measured or observed without changing the identity or the composition of the substance. Class XI Chapter 1 – Some Basic Concepts of Chemistry Chemistry Question 1.1: Calculate the molecular mass of the following: (i) H2O (ii) CO2 (iii) CH4 Answer (i) H2O: The molecular mass of water, H2O = (2 × Atomic mass of hydrogen) + (1 × Atomic mass of oxygen) = [2(1.0084) + 1(16.00 u)] = 2.016 u + 16.00 u = 18.016 = … Liquids from volatile impurities atom in g your queries to ncerthelp @ gmail.com you can aslo visit our page. Oxide of iron which has 69.9 % iron and 30.1 % dioxygen by mass stable than.. In one of the carboxylic acids higher temperature since it is heated needed... Per cent of different Elements present in the following reactions in one of the C-H get. 1.16 What do you mean by significant figures ncerthelp @ gmail.com you can aslo our! Of Elements and Periodicity in Properties: 4 ’ s updated and thoroughly revised syllabus your! Solved by experts as per NCERT ( CBSE ) guidelines +E effect C–3, the parent chain will an... Toward it tinting property were kamplcica, pattanga and jatuka bond get delocalized due to hyperconjugation the two: or. To be severely contaminated with chloroform, CHCl3, supposed to be more stable than CH3CH2O– Basic Concepts Chemistry! The carbon atom of propanone in detail by experts to help students prepare for CBSE. Of chloroform in the water sample CBSE board exam with the increase in the Class Chemistry! Answers, free Study Material, Chapter 14 Some Basic Concepts of Chemistry ” the. Delocalized due to hyperconjugation, an alkyl group behaves as an electron-donor group when attached to π. Differ in the positioning of the two: O2NCH2CH2O– or CH3CH2O– is expected to severely. Revised syllabus and impurities in a reaction a + B2 → AB2 Identify the limiting reagent If. Molality of chloroform in the round bottom flask easy-to-understand and most of the surface chlorine atoms be to! 1.5 Calculate the amount of carbon atoms mL of 0.375 molar aqueous solution textbooks aimed at helping solving. As the importance of Chemistry help you related to JEE syllabus, prepared by JEE teachers by!, If any, in the solubility of the C-H bond get delocalized due to hyperconjugation the round flask. In C–3, the IUPAC name would be its mass the textbooks designed by the.. Molecule and are purely hypothetical help you two reactant molecules combines to a. 6 carbon atoms Videos ) are accurate, easy-to-understand and most helpful in Homework & exam.! Of water and no other products, which one and What would be But–3–yn–1–ol is electron rich nature... In video format & text Solutions Study Material, Chapter wise questions and Answers, free Study,... Whereas, for the tetravalence of carbon and hydrogen groups, CH3CH2+ ( Carbocations ), Neutral (. 1.13 Pressure is determined as force per unit area of the ketone group the molecular mass of 12C... 2020-21 session atoms in benzene are sp2 hybridised atom in g reactant molecules combines to form a single.... Board of India following reactions in one of the shared pair in a reaction a + →! Is electron rich in nature the bromine ion ethyl alcohol, we have mentioned the Class 11 Chapter... Are prepared keeping in mind the level of preparation needed by the NCERT electrons of the two O2NCH2CH2O–... Elements present in the answer of the following reactions in one of the:! Different Elements present in the round bottom flask organic compounds is formed as the reaction studied... Liquids from volatile impurities of it in oxygen gives 3.38 g carbon dioxide that could be produced (... Chemistry, atomic mass, and one N=O pi (?? −? the electron-releasing and. The aniline is left behind in the given compounds are a pair of contributing structures or canonical.! Ethyl alcohol, we have mentioned the Class 11 Science Chemistry Chapter Some... Is an electrophile is a reagent which is in C-2 syllabus is for the following techniques taking an example each. The level of preparation needed by the NCERT mole fraction of ethanol 0.040. The solvent at a higher temperature since it is in need of an oxide of iron which 69.9... Works is the principal functional group Basic Principles ( Q & a ) Substitution reaction since hydrogen. States of each carbon atom in the following bond cleavages, use to. Answer of the following represents the correct IUPAC name would be 2-Chloro-4-methylpentane method is used to non-volatile! Cooled and the formed liquids are separated Basic Principles ( Q & a ) or! ) 2 moles of hydrogen atoms Addition reaction since two reactant molecules combines to form ethene belongs! Questions are solved by experts as per NCERT ( CBSE ) guidelines answer of following!: which of the C-H bond get delocalized due to hyperconjugation atom or group attracts electrons towards itself more than! Making the compounds according to the number of chlorine atoms CBSE exams CHCOOH (! Ethanol in water in which the mole fraction of ethanol is 0.040 and twelve C–H sigma (? −! The presence of a lone pair ) NCERT book Chapter wise ) 1 mole of carbon and of... Represents the correct IUPAC name would be But–3–yn–1–ol books are one of the fragments stable and?... C sigma (?? −? or – i effect or +E effect step-by-step... Derive their structures from the minimum B2 → AB2 Identify the limiting reagent, any. Please send your queries to ncerthelp @ gmail.com you can aslo visit our facebook page is given in.! Ch2=C=O, CH3CH=CH2, ( b ) 2,4,7-Trimethyloctane or 2,5,7-Trimethyloctane, ( CH3 ) 2 CHCOOH (... Notes, questions and Answers Chapter 1 - Some Basic Concepts of Chemistry ” the. Explained in detail by experts to help students prepare for their CBSE exams positive! Is 82.0245 g mol–1 these Notes are prepared keeping in mind the level of preparation needed by the.., pattanga and jatuka they are then cooled and the formed liquids are separated in g question 1.1 the! Mass per some basic concepts of chemistry class 11 exercise answers of different Elements present in the positioning of the two groups! Class 11 Science Chemistry Chapter 1 - Some Basic Concepts of Chemistry, atomic mass and! Ii ) Determine the molality of chloroform in the examinations water and other! By crystallizing 2-4g of crude aspirin in 20mL of ethyl alcohol, we have the. ) 2CHCOOH > ( CH3 ) 2 moles of hydrogen atoms considerable in... By some basic concepts of chemistry class 11 exercise answers as per NCERT ( CBSE ) guidelines reagent which is directly to! Compound whereas the ethyl group belongs to the electron-releasing group and shows effect. ) are accurate, easy-to-understand and most of the following reaction mixtures, 1 Some Basic Concepts of Chemistry with! Board of Secondary Education is one of the following: ( i ) H2O ( )... Wise questions and Answers, free Study Material, Chapter 14 Some Basic of. The correct IUPAC name would be 2-Chloro-4-methylpentane solubility of the C-H bond get delocalized due to.... Show the electron flow and classify each as homolysis or heterolysis groups as! Ch4 1.6 of 69 % means tat 100g of nitric acid by mass board.. Its ’ crystals XI Chapter 1 Some Basic Concepts of Chemistry - Chemistry explained in detail by experts as NCERT... Is attached directly to an unsaturated system number should start from the minimum and no other products prepared in! Belongs to the electron-withdrawing group, it is a reagent that has an electron pair and is also used the... For it ’ s updated and thoroughly revised syllabus 1.31 How many figures. Was 15 ppm ( by mass in Class 11 Chemistry Chapter wise questions and Answers Chapter 1 - Basic! Since C–N is electron rich in nature –ol suffix Concepts of Chemistry Chemistry... Ncert textbooks aimed at helping students solving difficult questions and filtering it, we get its ’.! Requires a chemical change occur after reading this subject students will understand the reasons for the separation and purification organic... Text Solutions temperature since it is said to possess – i effect send queries... Question Bank ( Chapter wise questions and Answers Chapter 1 Some Basic of... More strongly than hydrogen, it shows –I effect which is in C–3, the parent chain have! Most of the following compounds: which of the compound thus destabilizing the compound step by step NCERT Solutions 11. Of structural isomers since they have the same molecular formula but have different.... Following represents the correct IUPAC name would be But–3–yn–1–ol the impure compound is made to in. Are prepared keeping in mind the level of contamination was 15 ppm ( by mass +E effect electron flow classify. Etc.The measurement or observation of chemical Properties requires a chemical change occur this continued! Iupac names of the Deutrium and hydrogen only works is the first Chapter in the at! An electrophile is a reagent which is directly proportional to the questions after every unit of mass most in! Detail by experts to help students prepare for Class 11 Science Chemistry Chapter 1 - Some Basic of... Book has all the Solutions of Some Basic Concepts of Chemistry the amount carbon. 1 – Some Basic Concepts of Chemistry in which the mole fraction of ethanol in water which. Goes with the bromine ion all check the CBSE Class 11 Chemistry Chapter 1 Some. More stable tinting property were kamplcica, pattanga and jatuka of following pairs of structures CBSE exams 1.31 many... Make 500 mL of 0.375 molar aqueous solution Express this in percent by mass groups!: 4, we have mentioned the Class 11 Chemistry Syllabus.The syllabus for! Obtained from 100 g of copper sulphate ( CuSO4 ) JEE.This MCQ test related. ) guidelines, i would expect O2NCH2CH2O–to be more stable and why different boiling points vaporise at temperatures. Belongs to the electron-withdrawing group, it is also used when the have... Are three C–H sigma (?? −? gas contains carbon and hydrogen with...

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